DeepSeek-V4-Flash-0731
DeepSeek-V4-Flash-0731 is an AI model released by DeepSeek on Friday, Jul 31 2026, 98 days after DeepSeek-V4-Flash. Benchmark results (shown below) cover Terminal-Bench 2.1, Toolathlon-Verified, CyberGym, and AutomationBench.
Benchmarks
About DeepSeek-V4-Flash-0731
DeepSeek-V4-Flash-0731, announced July 31, 2026 as the "official" V4-Flash API in public beta, was a post-training refresh of the April V4-Flash build — same architecture, retrained for agentic work. The jump was unusually large for a checkpoint update: on DeepSeek's own evaluation harness it scored 82.7 on Terminal-Bench 2.1 against 61.8 for the April build, and 76.7 on CyberGym, surpassing the larger V4-Pro-Preview on several coding benchmarks despite being the cheaper tier. DeepSeek's harness numbers for competitor models differed from those labs' own published figures, so its launch chart is best read as within-family comparison.
The release doubled as a renaming: DeepSeek retroactively designated the April 24 builds V4-Flash-Preview and V4-Pro-Preview, and served the new checkpoint under the unchanged deepseek-v4-flash API name — existing callers were switched to it without a code change. It added native support for the OpenAI Responses API format and Codex compatibility. Unlike every prior DeepSeek release, it shipped API-only at launch: no 0731 weights were published, and Hugging Face still carried the April build at release. V4-Pro, the app, and the web product stayed on their April checkpoints.
DeepSeek-V4-Flash-0731 — frequently asked questions
- When was DeepSeek-V4-Flash-0731 released?
- DeepSeek-V4-Flash-0731 was released by DeepSeek on Friday, Jul 31 2026.
- Who made DeepSeek-V4-Flash-0731?
- DeepSeek-V4-Flash-0731 was built by DeepSeek. Chinese AI lab known for efficient, open-weight models. Gained attention for strong performance at lower cost.
- What benchmark scores did DeepSeek-V4-Flash-0731 get?
- DeepSeek-V4-Flash-0731 reports 4 tracked benchmark scores — Terminal-Bench 2.1: 82.7%; Toolathlon-Verified: 70.3%; CyberGym: 76.7%; AutomationBench: 25.1%. Scores are the figures published at release by DeepSeek.
- Is DeepSeek-V4-Flash-0731 open source?
- No. DeepSeek-V4-Flash-0731 is a proprietary model. The weights are not published — it is available only through the provider's own API, apps, or partner platforms.
- What came before and after DeepSeek-V4-Flash-0731?
- DeepSeek's previous tracked release was DeepSeek-V4-Flash on Apr 24 2026, 98 days earlier. It is the most recent DeepSeek model tracked on AI Release Tracker.