AI Launch Profile
DeepSeek V4-Flash-0731 launches in API beta with native Codex support
DeepSeek released DeepSeek-V4-Flash-0731 as the official V4-Flash API public beta. The checkpoint keeps the preview model’s architecture and size but adds new post-training, native Responses API support, and an official Codex configuration path. DeepSeek also published the 0731 weights in a public, ungated MIT-licensed Hugging Face repository.
At a glance
Launch Snapshot
- Company
- DeepSeek
- Launch date
- July 31, 2026
- Launch type
- Major Update, Model Release
- Category
- AI Agents, AI Coding Tools, AI Developer Tools, AI Models
- Audience
- AI Engineers, Developers, Engineering Teams
- Pricing
- For the historical 0731 release, DeepSeek listed $0.0028 per million cached input tokens, $0.14 per million uncached input tokens and $0.28 per million output tokens, and described a future 2× peak-hour rate without an effective date. These are not verified current rates for the rolling 1017 alias.
- Free plan
- No
- API
- Not publicly confirmed
- Open weights/source
- Yes
Launch Context
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Verification & Sources
- Evidence state
- Recheck due
- Source links
- 10
- Freshness
- Needs recheck: checked July 31, 2026
- Last updated
- July 31, 2026
What this evidence state means
- Definition
- The claim was previously checked, but its review window expired or a material change may have invalidated it.
- Required provenance
- The prior evidence and check date are retained, together with the expiry or change signal that triggered recheck.
- Owner
- Kingy freshness queue owner and assigned editorial reviewer
- Freshness rule
- This is already outside its freshness rule. It must not be presented as current until reviewed against current evidence.
- Disputes and corrections
- Use “Suggest a correction” on the record. Kingy editorial reviews the cited evidence, records material corrections, and changes or removes the state when it is not supported.
Key source checks
Suggest a correction
Creator Coverage Next Steps
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Kingy AI Take
DeepSeek launched V4-Flash-0731 with native Codex support and MIT-licensed weights; its benchmark claims remain vendor-reported. DeepSeek’s current first-call documentation routes rolling and legacy V4 API aliases to the 1017 checkpoint, not 0731. The rates recorded for 0731 are historical; the current pricing URL returned first-call documentation during this review, so a current numeric rate was not verified. Vendor benchmarks remain unverified.
Who it is for
Developers, AI engineers and engineering teams evaluating lower-cost coding agents through Codex CLI, the ChatGPT desktop app or the Codex extension for VS Code.
What feels promising
DeepSeek documented native Responses API support and published MIT-licensed weights for 0731. Its reported benchmark gains remain vendor claims. The documented $0.14 per million uncached input tokens was a historical 0731 rate, not a verified current rolling-alias price.
What feels unproven
Kingy.ai has not rerun the benchmarks, tested the model in a production repository or validated a self-hosted deployment. DeepSeek used an unreleased harness, maximum reasoning effort and specific sampling settings; two cited DSBench results come from internal test sets. Source review on October 28, 2026 Pacific; no new product, account-access or paid API test was performed.
Traction notes
At review time on July 31, 2026, DeepSeek’s X announcement showed roughly 2.9 million views, while Cline’s benchmark comparison showed more than 500,000 views. These figures indicate attention, not independent validation.
Source list
Sources
Related Kingy Links
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