{ "name": "Kingy AI Price Index", "licence": "CC BY 4.0", "citation": "Kingy AI Price Index, September 2025 edition. Kingy AI. https://kingy.ai/ai-price-index/2025-09/", "url": "https://kingy.ai/ai-price-index/2025-09/", "method": { "version": "1.0", "url": "https://kingy.ai/ai-price-index/#method" }, "edition": { "edition": "2025-09", "label": "September 2025", "reconstructed": true, "referenceDate": "2025-09-01", "capturedAt": "2025-09-01T00:00:00+00:00", "method": "1.0", "previous": "2025-08", "previousReferenceDate": "2025-08-01", "intervalDays": 31, "headline": "In September 2025, a million AI tokens cost a median $3.44 from frontier models (down 0.9%), $0.82 from mid-range models (down 2.9%) and $0.26 from small models (no change). Changes compare with August.", "story": { "title": "Mid-range model prices fell 2.9% in September", "text": "The median mid-range model cost $0.82 per million tokens, down from $0.85 in August. OpenAI launched a cheaper mid-range model and Mistral AI is now counted.", "tier": "mid" }, "changes": { "likeForLike": [], "unchanged": 11, "basket": [ { "provider": "Anthropic", "tier": "frontier", "from": { "model": "Claude Opus 4", "value": "30.0000" }, "to": { "model": "Claude Opus 4.1", "value": "30.0000" } }, { "provider": "Mistral AI", "tier": "frontier", "from": { "model": "Mistral Medium 3", "value": "0.8000" }, "to": { "model": "Mistral Large 24.11", "value": "3.0000" } }, { "provider": "Mistral AI", "tier": "mid", "from": null, "to": { "model": "Mistral Medium 3", "value": "0.8000" } }, { "provider": "OpenAI", "tier": "frontier", "from": { "model": "GPT-4.1", "value": "3.5000" }, "to": { "model": "GPT-5", "value": "3.4375" } }, { "provider": "OpenAI", "tier": "mid", "from": { "model": "GPT-4.1 mini", "value": "0.7000" }, "to": { "model": "GPT-5 mini", "value": "0.6875" } }, { "provider": "OpenAI", "tier": "small", "from": { "model": "GPT-4.1 nano", "value": "0.1750" }, "to": { "model": "GPT-5 nano", "value": "0.1375" } } ] }, "scheduled": [], "outlook": [], "withheld": [], "corrections": [], "tiers": [ { "id": "frontier", "label": "Frontier", "kind": "api", "summary": "Each lab's most capable model", "unit": "USD per 1M tokens, 3:1 input:output blend", "value": "3.4375", "previousValue": "3.4688", "changePct": -0.9, "n": 6, "min": "0.9600", "max": "30.0000", "constituents": [ "deepseek-reasoner", "mistral-large-24-11", "openai-gpt-5", "google-gemini-2-5-pro", "xai-grok-4", "anthropic-claude-opus-4-1" ], "published": true, "indexLevel": "76.39" }, { "id": "mid", "label": "Mid-range", "kind": "api", "summary": "Each lab's balanced workhorse model", "unit": "USD per 1M tokens, 3:1 input:output blend", "value": "0.8250", "previousValue": "0.8500", "changePct": -2.9, "n": 4, "min": "0.6875", "max": "6.0000", "constituents": [ "openai-gpt-5-mini", "mistral-medium-3", "google-gemini-2-5-flash", "anthropic-claude-sonnet-4" ], "published": true, "indexLevel": "20.63" }, { "id": "small", "label": "Small", "kind": "api", "summary": "Each lab's low-cost, high-volume model", "unit": "USD per 1M tokens, 3:1 input:output blend", "value": "0.2625", "previousValue": "0.2625", "changePct": 0, "n": 6, "min": "0.1375", "max": "1.6000", "constituents": [ "openai-gpt-5-nano", "mistral-small-3-2", "google-gemini-2-5-flash-lite", "xai-grok-3-mini", "deepseek-chat", "anthropic-claude-3-5-haiku" ], "published": true, "indexLevel": "50.00" }, { "id": "standard", "label": "Standard plan", "kind": "subscription", "summary": "Each provider's main paid individual plan", "unit": "USD per month", "value": null, "previousValue": null, "changePct": null, "n": 0, "min": null, "max": null, "constituents": [], "published": false, "indexLevel": null }, { "id": "top", "label": "Top plan", "kind": "subscription", "summary": "Each provider's highest-priced individual plan", "unit": "USD per month", "value": null, "previousValue": null, "changePct": null, "n": 0, "min": null, "max": null, "constituents": [], "published": false, "indexLevel": null } ], "observations": [ { "id": "openai-gpt-5", "provider": "OpenAI", "model": "GPT-5", "modelId": "gpt-5", "tier": "frontier", "status": "verified", "input": "1.250", "output": "10.000", "blended": "3.4375", "source": { "url": "https://openai.com/api/pricing", "page": "https://openai.com/api/pricing", "fetchedAt": "2026-10-19T21:53:02+00:00", "snapshotUrl": "https://web.archive.org/web/20250831102237/https://openai.com/api/pricing/", "snapshotAt": "2025-08-31T10:22:37+00:00", "sha256": "5a2de637e3b1de3b1fc20efbed58e28e8f5c09b51b5a7257ee238e04bc5f0dda", "excerpt": "GPT-5 The best model for coding and agentic tasks across industries Price Input: $1.250 / 1M tokens Cached input: $0.125 / 1M tokens Output: $10.000" }, "positioning": { "url": "https://openai.com/api/pricing", "snapshotUrl": "https://web.archive.org/web/20250831102237/https://openai.com/api/pricing/", "quote": "GPT-5 The best model for coding and agentic tasks across industries", "rule": null } }, { "id": "openai-gpt-5-mini", "provider": "OpenAI", "model": "GPT-5 mini", "modelId": "gpt-5-mini", "tier": "mid", "status": "verified", "input": "0.250", "output": "2.000", "blended": "0.6875", "source": { "url": "https://openai.com/api/pricing", "page": "https://openai.com/api/pricing", "fetchedAt": "2026-10-19T21:53:02+00:00", "snapshotUrl": "https://web.archive.org/web/20250831102237/https://openai.com/api/pricing/", "snapshotAt": "2025-08-31T10:22:37+00:00", "sha256": "5a2de637e3b1de3b1fc20efbed58e28e8f5c09b51b5a7257ee238e04bc5f0dda", "excerpt": "GPT-5 mini A faster, cheaper version of GPT-5 for well-defined tasks Price Input: $0.250 / 1M tokens Cached input: $0.025 / 1M tokens Output: $2.000" }, "positioning": { "url": "https://openai.com/api/pricing", "snapshotUrl": "https://web.archive.org/web/20250831102237/https://openai.com/api/pricing/", "quote": "GPT-5 mini A faster, cheaper version of GPT-5 for well-defined tasks", "rule": null } }, { "id": "openai-gpt-5-nano", "provider": "OpenAI", "model": "GPT-5 nano", "modelId": "gpt-5-nano", "tier": "small", "status": "verified", "input": "0.050", "output": "0.400", "blended": "0.1375", "source": { "url": "https://openai.com/api/pricing", "page": "https://openai.com/api/pricing", "fetchedAt": "2026-10-19T21:53:02+00:00", "snapshotUrl": "https://web.archive.org/web/20250831102237/https://openai.com/api/pricing/", "snapshotAt": "2025-08-31T10:22:37+00:00", "sha256": "5a2de637e3b1de3b1fc20efbed58e28e8f5c09b51b5a7257ee238e04bc5f0dda", "excerpt": "GPT-5 nano The fastest, cheapest version of GPT-5—great for summarization and classification tasks Price Input: $0.050 / 1M tokens Cached input: $0.005 / 1M tokens Output: $0.400" }, "positioning": { "url": "https://openai.com/api/pricing", "snapshotUrl": "https://web.archive.org/web/20250831102237/https://openai.com/api/pricing/", "quote": "GPT-5 nano The fastest, cheapest version of GPT-5", "rule": null } }, { "id": "anthropic-claude-opus-4-1", "provider": "Anthropic", "model": "Claude Opus 4.1", "modelId": "claude-opus-4-1-20250805", "tier": "frontier", "status": "verified", "input": "15", "output": "75", "cachedInput": "1.50", "blended": "30.0000", "source": { "url": "https://docs.anthropic.com/en/docs/about-claude/models/overview", "page": "https://docs.anthropic.com/en/docs/about-claude/models/overview", "fetchedAt": "2026-10-19T22:02:50+00:00", "snapshotUrl": "https://web.archive.org/web/20250829042927/https://docs.anthropic.com/en/docs/about-claude/models/overview", "snapshotAt": "2025-08-29T04:29:27+00:00", "sha256": "bc248d0a079ed5e8aaefb5fb0848f9e8d39d17497e1d7d8da9795d59e7dd4e77", "excerpt": "Claude Opus 4.1 $15 / MTok $18.75 / MTok $30 / MTok $1.50 / MTok $75 / MTok" }, "positioning": { "url": "https://docs.anthropic.com/en/docs/about-claude/models/overview", "snapshotUrl": "https://web.archive.org/web/20250829042927/https://docs.anthropic.com/en/docs/about-claude/models/overview", "quote": "Feature Claude Opus 4.1 Claude Opus 4 Claude Sonnet 4 Claude Sonnet 3.7 Claude Haiku 3.5 Claude Haiku 3 Description Our most capable model", "rule": null } }, { "id": "anthropic-claude-sonnet-4", "provider": "Anthropic", "model": "Claude Sonnet 4", "modelId": "claude-sonnet-4-20250514", "tier": "mid", "status": "verified", "input": "3", "output": "15", "cachedInput": "0.30", "blended": "6.0000", "source": { "url": "https://docs.anthropic.com/en/docs/about-claude/models/overview", "page": "https://docs.anthropic.com/en/docs/about-claude/models/overview", "fetchedAt": "2026-10-19T22:02:50+00:00", "snapshotUrl": "https://web.archive.org/web/20250829042927/https://docs.anthropic.com/en/docs/about-claude/models/overview", "snapshotAt": "2025-08-29T04:29:27+00:00", "sha256": "bc248d0a079ed5e8aaefb5fb0848f9e8d39d17497e1d7d8da9795d59e7dd4e77", "excerpt": "Claude Sonnet 4 $3 / MTok $3.75 / MTok $6 / MTok $0.30 / MTok $15 / MTok" }, "positioning": { "url": "https://docs.anthropic.com/en/docs/about-claude/models/overview", "snapshotUrl": "https://web.archive.org/web/20250829042927/https://docs.anthropic.com/en/docs/about-claude/models/overview", "quote": "Feature Claude Opus 4.1 Claude Opus 4 Claude Sonnet 4 Claude Sonnet 3.7 Claude Haiku 3.5 Claude Haiku 3 Description Our most capable model Our previous flagship model High-performance model", "rule": "Anthropic's comparison table calls Sonnet 4 a \"High-performance model\" with \"High intelligence and balanced performance\"; the Sonnet line is its mid-range line between Opus and Haiku." } }, { "id": "anthropic-claude-3-5-haiku", "provider": "Anthropic", "model": "Claude Haiku 3.5", "modelId": "claude-3-5-haiku-20241022", "tier": "small", "status": "verified", "input": "0.80", "output": "4", "cachedInput": "0.08", "blended": "1.6000", "source": { "url": "https://docs.anthropic.com/en/docs/about-claude/models/overview", "page": "https://docs.anthropic.com/en/docs/about-claude/models/overview", "fetchedAt": "2026-10-19T22:02:50+00:00", "snapshotUrl": "https://web.archive.org/web/20250829042927/https://docs.anthropic.com/en/docs/about-claude/models/overview", "snapshotAt": "2025-08-29T04:29:27+00:00", "sha256": "bc248d0a079ed5e8aaefb5fb0848f9e8d39d17497e1d7d8da9795d59e7dd4e77", "excerpt": "Claude Haiku 3.5 $0.80 / MTok $1 / MTok $1.6 / MTok $0.08 / MTok $4 / MTok" }, "positioning": { "url": "https://docs.anthropic.com/en/docs/about-claude/models/overview", "snapshotUrl": "https://web.archive.org/web/20250829042927/https://docs.anthropic.com/en/docs/about-claude/models/overview", "quote": "Feature Claude Opus 4.1 Claude Opus 4 Claude Sonnet 4 Claude Sonnet 3.7 Claude Haiku 3.5 Claude Haiku 3 Description Our most capable model Our previous flagship model High-performance model High-performance model with early extended thinking Our fastest model", "rule": "Claude 4 has no Haiku model; Haiku 3.5, which Anthropic calls \"Our fastest model\", remains its small model." } }, { "id": "deepseek-chat", "provider": "DeepSeek", "model": "DeepSeek V3.1 (non-thinking)", "modelId": "deepseek-chat", "tier": "small", "status": "verified", "input": "0.27", "output": "1.10", "cachedInput": "0.07", "blended": "0.4775", "conditions": "Standard (peak) rate; DeepSeek charged a discount price from 16:30 to 00:30 UTC. The page announces a single new price list for both endpoints from 2025-09-05 16:00 UTC.", "source": { "url": "https://api-docs.deepseek.com/quick_start/pricing", "page": "https://api-docs.deepseek.com/quick_start/pricing", "fetchedAt": "2026-10-19T22:11:50+00:00", "snapshotUrl": "https://web.archive.org/web/20250829173236/https://api-docs.deepseek.com/quick_start/pricing/", "snapshotAt": "2025-08-29T17:32:36+00:00", "sha256": "9acf1d74990b0d8985d7a82fbd44c0d7b04e62b81c0fd6500ee875a664894b44", "excerpt": "deepseek-chat deepseek-reasoner STANDARD PRICE （UTC 00:30-16:30） 1M INPUT TOKENS (CACHE HIT) $0.07 $0.14 1M INPUT TOKENS (CACHE MISS) $0.27 $0.55 1M OUTPUT TOKENS $1.10" }, "positioning": { "url": "https://api-docs.deepseek.com/quick_start/pricing", "snapshotUrl": "https://web.archive.org/web/20250829173236/https://api-docs.deepseek.com/quick_start/pricing/", "quote": "MODEL VERSION DeepSeek-V3.1 (Non-thinking Mode) DeepSeek-V3.1 (Thinking Mode)", "rule": "deepseek-chat and deepseek-reasoner were the non-thinking and thinking modes of DeepSeek-V3.1, still priced separately on this date; as in earlier editions the higher-priced endpoint is the frontier constituent and the lower-priced the small one." } }, { "id": "deepseek-reasoner", "provider": "DeepSeek", "model": "DeepSeek V3.1 (thinking)", "modelId": "deepseek-reasoner", "tier": "frontier", "status": "verified", "input": "0.55", "output": "2.19", "cachedInput": "0.14", "blended": "0.9600", "conditions": "Standard (peak) rate; DeepSeek charged a discount price from 16:30 to 00:30 UTC. The page announces a single new price list for both endpoints from 2025-09-05 16:00 UTC.", "source": { "url": "https://api-docs.deepseek.com/quick_start/pricing", "page": "https://api-docs.deepseek.com/quick_start/pricing", "fetchedAt": "2026-10-19T22:11:50+00:00", "snapshotUrl": "https://web.archive.org/web/20250829173236/https://api-docs.deepseek.com/quick_start/pricing/", "snapshotAt": "2025-08-29T17:32:36+00:00", "sha256": "9acf1d74990b0d8985d7a82fbd44c0d7b04e62b81c0fd6500ee875a664894b44", "excerpt": "deepseek-chat deepseek-reasoner STANDARD PRICE （UTC 00:30-16:30） 1M INPUT TOKENS (CACHE HIT) $0.07 $0.14 1M INPUT TOKENS (CACHE MISS) $0.27 $0.55 1M OUTPUT TOKENS $1.10 $2.19" }, "positioning": { "url": "https://api-docs.deepseek.com/quick_start/pricing", "snapshotUrl": "https://web.archive.org/web/20250829173236/https://api-docs.deepseek.com/quick_start/pricing/", "quote": "MODEL VERSION DeepSeek-V3.1 (Non-thinking Mode) DeepSeek-V3.1 (Thinking Mode)", "rule": "deepseek-chat and deepseek-reasoner were the non-thinking and thinking modes of DeepSeek-V3.1, still priced separately on this date; as in earlier editions the higher-priced endpoint is the frontier constituent and the lower-priced the small one." } }, { "id": "google-gemini-2-5-pro", "provider": "Google", "model": "Gemini 2.5 Pro", "modelId": "gemini-2.5-pro", "tier": "frontier", "status": "verified", "input": "1.25", "output": "10.00", "blended": "3.4375", "conditions": "Prompts up to the shortest context band (128K or 200K tokens).", "source": { "url": "https://ai.google.dev/gemini-api/docs/pricing", "page": "https://ai.google.dev/gemini-api/docs/pricing", "fetchedAt": "2026-10-19T22:11:32+00:00", "snapshotUrl": "https://web.archive.org/web/20250830042438/https://ai.google.dev/gemini-api/docs/pricing", "snapshotAt": "2025-08-30T04:24:38+00:00", "sha256": "84cca97674c95c5dd1ff80249b9b9f6a8f2d8302e416ede5bd9326187b68c257", "excerpt": "Gemini 2.5 Pro Try it in Google AI Studio Our state-of-the-art multipurpose model, which excels at coding and complex reasoning tasks. Free Tier Paid Tier, per 1M tokens in USD Input price Free of charge $1.25, prompts <= 200k tokens $2.50, prompts > 200k tokens Output price (including thinking tokens) Free of charge $10.00" }, "positioning": { "url": "https://ai.google.dev/gemini-api/docs/pricing", "snapshotUrl": "https://web.archive.org/web/20250830042438/https://ai.google.dev/gemini-api/docs/pricing", "quote": "Gemini 2.5 Pro Try it in Google AI Studio Our state-of-the-art multipurpose model, which excels at coding and complex reasoning tasks", "rule": "Google made no flagship claim for one model on this date, so the newest model in its highest-priced line (Pro) takes the frontier slot. Paid previews count." } }, { "id": "google-gemini-2-5-flash", "provider": "Google", "model": "Gemini 2.5 Flash", "modelId": "gemini-2.5-flash", "tier": "mid", "status": "verified", "input": "0.30", "output": "2.50", "blended": "0.8500", "conditions": "Prompts up to the shortest context band (128K or 200K tokens).", "source": { "url": "https://ai.google.dev/gemini-api/docs/pricing", "page": "https://ai.google.dev/gemini-api/docs/pricing", "fetchedAt": "2026-10-19T22:11:32+00:00", "snapshotUrl": "https://web.archive.org/web/20250830042438/https://ai.google.dev/gemini-api/docs/pricing", "snapshotAt": "2025-08-30T04:24:38+00:00", "sha256": "84cca97674c95c5dd1ff80249b9b9f6a8f2d8302e416ede5bd9326187b68c257", "excerpt": "Gemini 2.5 Flash Try it in Google AI Studio Our first hybrid reasoning model which supports a 1M token context window and has thinking budgets. Free Tier Paid Tier, per 1M tokens in USD Input price Free of charge $0.30 (text / image / video) $1.00 (audio) Output price (including thinking tokens) Free of charge $2.50" }, "positioning": { "url": "https://ai.google.dev/gemini-api/docs/pricing", "snapshotUrl": "https://web.archive.org/web/20250830042438/https://ai.google.dev/gemini-api/docs/pricing", "quote": "Gemini 2.5 Flash Try it in Google AI Studio Our first hybrid reasoning model which supports a 1M token context window and has thinking budgets", "rule": "Flash is Google's line between Pro and Flash-Lite; its newest generally available or paid-preview model takes the mid-range slot." } }, { "id": "google-gemini-2-5-flash-lite", "provider": "Google", "model": "Gemini 2.5 Flash-Lite", "modelId": "gemini-2.5-flash-lite", "tier": "small", "status": "verified", "input": "0.10", "output": "0.40", "blended": "0.1750", "conditions": "Prompts up to the shortest context band (128K or 200K tokens).", "source": { "url": "https://ai.google.dev/gemini-api/docs/pricing", "page": "https://ai.google.dev/gemini-api/docs/pricing", "fetchedAt": "2026-10-19T22:11:32+00:00", "snapshotUrl": "https://web.archive.org/web/20250830042438/https://ai.google.dev/gemini-api/docs/pricing", "snapshotAt": "2025-08-30T04:24:38+00:00", "sha256": "84cca97674c95c5dd1ff80249b9b9f6a8f2d8302e416ede5bd9326187b68c257", "excerpt": "Gemini 2.5 Flash-Lite Try it in Google AI Studio Our smallest and most cost effective model, built for at scale usage. Free Tier Paid Tier, per 1M tokens in USD Input price (text, image, video) Free of charge $0.10 (text / image / video) $0.30 (audio) Output price (including thinking tokens) Free of charge $0.40" }, "positioning": { "url": "https://ai.google.dev/gemini-api/docs/pricing", "snapshotUrl": "https://web.archive.org/web/20250830042438/https://ai.google.dev/gemini-api/docs/pricing", "quote": "Gemini 2.5 Flash-Lite Try it in Google AI Studio Our smallest and most cost effective model, built for at scale usage", "rule": null } }, { "id": "mistral-large-24-11", "provider": "Mistral AI", "model": "Mistral Large 24.11", "modelId": "mistral-large-2411", "tier": "frontier", "status": "verified", "input": "2", "output": "6", "blended": "3.0000", "source": { "url": "https://mistral.ai/pricing", "page": "https://mistral.ai/pricing", "fetchedAt": "2026-10-19T22:02:10+00:00", "snapshotUrl": "https://web.archive.org/web/20250827170951/https://mistral.ai/pricing", "snapshotAt": "2025-08-27T17:09:51+00:00", "sha256": "8d00d0cb6c77453ec4c8a2207fc4bbb5e50070ed308d45f33e3f6ef61abf96e0", "excerpt": "\\\"api_endpoint\\\":\\\"mistral-large-latest\\\",\\\"price\\\":[{\\\"value\\\":\\\"Input (/M tokens)\\\",\\\"price_dollar\\\":\\\"\\u003cp\\u003e2$\\u003c/p\\u003e\\\",\\\"price_euro\\\":\\\"\\u003cp\\u003e1.8\\u0026euro;\\u003c/p\\u003e\\\",\\\"locale\\\":\\\"en\\\"},{\\\"value\\\":\\\"Output (/M tokens)\\\",\\\"price_dollar\\\":\\\"\\u003cp\\u003e$6" }, "positioning": { "url": "https://mistral.ai/pricing", "snapshotUrl": "https://web.archive.org/web/20250827170951/https://mistral.ai/pricing", "quote": "For complex tasks and sophisticated problems.", "rule": "Mistral's pricing page made no flagship claim on this date, so the newest model in its highest-priced general-purpose line takes the frontier slot." } }, { "id": "mistral-medium-3", "provider": "Mistral AI", "model": "Mistral Medium 3", "modelId": "mistral-medium-2505", "tier": "mid", "status": "verified", "input": "0.4", "output": "2", "blended": "0.8000", "source": { "url": "https://mistral.ai/pricing", "page": "https://mistral.ai/pricing", "fetchedAt": "2026-10-19T22:02:10+00:00", "snapshotUrl": "https://web.archive.org/web/20250827170951/https://mistral.ai/pricing", "snapshotAt": "2025-08-27T17:09:51+00:00", "sha256": "8d00d0cb6c77453ec4c8a2207fc4bbb5e50070ed308d45f33e3f6ef61abf96e0", "excerpt": "\\\"api_endpoint\\\":\\\"mistral-medium-latest\\\",\\\"price\\\":[{\\\"value\\\":\\\"Input (/M tokens)\\\",\\\"price_dollar\\\":\\\"\\u003cp\\u003e$0.4\\u003c/p\\u003e\\\",\\\"price_euro\\\":\\\"\\u003cp\\u003e0.4\\u0026euro;\\u003c/p\\u003e\\\",\\\"locale\\\":\\\"en\\\"},{\\\"value\\\":\\\"Output (/M tokens)\\\",\\\"price_dollar\\\":\\\"\\u003cp\\u003e$2" }, "positioning": { "url": "https://mistral.ai/pricing", "snapshotUrl": "https://web.archive.org/web/20250827170951/https://mistral.ai/pricing", "quote": "State-of-the-art performance. Simplified enterprise deployments. Cost-efficient.", "rule": "Mistral describes Medium 3 as \"State-of-the-art performance ... 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