AI Model Profile
GPT-5.6 Sol
A GPT-5.6 model for professional text, code and image-input tasks.
Before you buy
Best for: Creators maintaining an older integration and comparing its quality with cheaper current options.
Price: US/USD API promo: US$4 input / US$20 output per million tokens
Included: Promotional pricing lasts at least through November 21, 2026; cached input is US$0.40 per million tokens.
Main limits: Prompts above 272K input tokens multiply full-request input by 2 and output by 1.5. A prior result does not establish current best value.
What Kingy showed: The September 2 work-per-dollar study reports 24/24 completed attempts, a 98.6 mean score and US$0.0342 per result meeting its 80-point threshold.
Buying details checked 2026-10-22 with region and currency stated above. Historical demonstrations and the broader fact ledger keep their own dates.
Check official plans · See the demonstration and disclosure · Compare these workflows
- Family
- GPT-5
- Release date
- Unknown
- Status
- Current
- Context window
- 1,050,000 tokens
- Output limit
- 128,000 tokens
- API
- yes
- Open weights
- no
- Local/self-hosted
- no
- Pricing
- OpenAI API pricing checked September 21, 2026: Standard requests with up to 272K input tokens cost $4.00 per million input tokens, $0.40 cached input and $20.00 output. Batch input/cached input/output: $2.00/$0.20/$10.00. These promotional rates are available at least through November 21, 2026; OpenAI has not established a replacement price here. Longer prompts, cache writes, processing tier and eligible regional processing affect the charge.
- Evidence state
- Recheck due
Benchmark Caveat
Benchmarks and provider capability notes are directional, not universal rankings. Results can shift with prompts, tool use, latency targets, pricing tier, safety filters, context length, and the workload mix a real team runs.
See the linked official model, docs, model-card, or pricing source for provider-published capability notes.
Best for
Creators maintaining an older integration and comparing its quality with cheaper current options.
Skip if
Skip if GPT-5.6 Terra or Luna meet the task, since all three share the same context window and max output.
Strengths
OpenAI lists Sol with a 1,050,000-token context window, 128,000 max output tokens, a 16 February 2026 knowledge cutoff, the highest reasoning tier in the family with reasoning-token support, text and image input, and supported function calling.
Weaknesses
Standard API output costs $20.00 per million tokens for prompts up to 272K input tokens at the promotional rate checked September 21, 2026. Long-context and Fast processing cost more. Output is text only.
Agent suitability
Useful for agent workflows when the provider supports tool use, long context, structured outputs, or workflow-specific APIs.
Kingy AI take
Use this as a source-backed shortlist candidate, not a universal ranking. Re-check official provider docs and run a task-specific trial before production adoption.
Kingy AI Product Facts
GPT-5.6 Sol
Current statusUnknown
- Company
- Not yet reviewed
- Primary job
- Not yet reviewed
- Audience
- Not yet reviewed
- Evidence
- Source-backed; coverage expanding
- Latest source check
- October 28, 2026
See all tracked product factsPricing, platforms, dependencies, data claims, regions, and timeline
Sources and checks
- Coverage
- 4 of 88 tracked fields currently verified
- Sources
- 1
Source-check dates apply to the tracked facts. Editorial updates elsewhere on this page may have a different date.
Plans and pricing units
Not yet structured in this Kingy record.
Where it runs
- Availability
- Not yet reviewed
Stack and integrations
- Model / provider dependencies
- Not yet reviewed
- Integrations
- Not yet reviewed
Data and regions
- Vendor data-use claim
- Not yet reviewed
- Vendor retention claim
- Not yet reviewed
- Regions
- Not yet reviewed
Launch and latest material update
- Launch
- Not yet reviewed
- Latest material update
- Not yet reviewed
Full Model Notes
Which plan is worth considering
US/USD API promo: US$4 input / US$20 output per million tokens. Promotional pricing lasts at least through November 21, 2026; cached input is US$0.40 per million tokens.
Limits that affect the purchase
Prompts above 272K input tokens multiply full-request input by 2 and output by 1.5. A prior result does not establish current best value. No ongoing free hosted entitlement is established for this route. API billing and account limits are separate from consumer chat or coding subscriptions.
What the existing demonstration shows
The September 2 work-per-dollar study reports 24/24 completed attempts, a 98.6 mean score and US$0.0342 per result meeting its 80-point threshold. The study used OpenRouter, twelve tasks twice and a 4,096-token completion cap. Its observed bills do not quote native API cost for your workload. This describes the dated retained Kingy record, not a new product test. See the retained Kingy demonstration.
Sources and buying-review date
Buying details checked October 22, 2026. Plan research uses current official sources; demonstration descriptions use the retained Kingy record and any captured creator chapters. No new subscription, paid generation or checkout was performed. The buying-review date does not renew every claim in the broader facts ledger.
Check official plans · Compare related workflows
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Coding notes
Use official docs and live evals before selecting this model for production coding workflows.
Reasoning notes
Provider capability notes are useful but should be validated on representative prompts and tools.
Creative notes
Use a small creative test set before standardizing outputs for brand, media, or customer-facing work.
Research notes
Track release notes and model lifecycle notices because availability and aliases can change.
API pricing notes
Pricing rechecked September 21, 2026. Amounts use the dollar notation displayed in OpenAI’s official API pricing table, per million tokens. For up to 272K input tokens, rates in input / cached input / cache write / output order are: Standard $4.00 / $0.40 / $5.00 / $20.00; Batch and Flex $2.00 / $0.20 / $2.50 / $10.00; Fast $8.00 / $0.80 / $10.00 / $40.00. Above 272K input tokens, the full request uses 2× these input, cached-input and cache-write rates and 1.5× the output rate. Fast replaces Priority processing. Eligible regional-processing endpoints add 10%; tool charges may be additional. Sol’s promotional pricing is available at least through November 21, 2026. Recheck before budgeting beyond that date; no later price is asserted. This is an API token-price review, not a ChatGPT or Codex subscription allowance. No paid API call or billing test was performed.
License notes
Commercial/API terms apply unless the linked official source states otherwise.
Hardware requirements
Cloud/API model; local hardware requirements are not published as a self-hosted path.
Official Model Links
Kingy coverage
Kingy AI articles that cover GPT-5.6 Sol, newest first.
- BlogClaude Opus 5.5 vs GPT-6 Astra, Sol and Luna vs GPT-5.6 Sol: Benchmarks and Real Costs
- GuideGPT-5.6 Sol vs Claude Opus 5 vs Grok 4.6: Which Frontier AI Model Is Best in 2026?
- BlogGrok 4.6 vs GPT-5.6 Sol vs Claude Fable 5: Which AI Is Best for Coding and Agents?
- BlogOpus 5.0 vs GPT-5.6 SOL Ultra: The Definitive 2026 Comparison
- GuideClaude Fable 5 vs GPT-5.6 Sol: Specs, Benchmarks, Cost and Which to Choose
- BlogOpenAI’s 64-Subagent Cycle Double Cover Conjecture Proof Claim
- BlogGPT-5.6 Sol vs Terra vs Luna: Benchmarks, Price & Best Uses
Model Intelligence Research Map
Use these internal paths to move from this model profile into provider pages, static comparison pages, related Kingy records, and the broader AI launch graph. These are research paths, not rankings.