Comparison / reviewed August 2, 2026
DeepSeek V4 Flash 0731 vs GLM-5.2
A decision guide for teams choosing between a DeepSeek API update focused on agent workflows and an open-weights reasoning model. It keeps first-party claims and independent measurements in separate lanes.
What this comparison can support
A close independent index snapshot; different release records and operating paths.
| Dimension | DeepSeek V4 Flash 0731 | GLM-5.2 |
|---|---|---|
| Release record | July 31, 2026 V4-Flash API update; DeepSeek says it was re-post-trained, with the preview architecture and size retained. Source ↗ | Independent tracker records a June 2026 release for GLM-5.2 (max). Consult Z.ai directly for live product terms. Source ↗ |
| Context | Official documentation lists a 1M-token context window. Source ↗ | Artificial Analysis lists a 1M-token context window for GLM-5.2 (max). Source ↗ |
| Independent index | Community reports and the independent tracker place the updated Flash at about 50 on its Intelligence Index. This is not a DeepSeek claim. Source ↗ | Artificial Analysis reports 51 for GLM-5.2 (max) on the same index family. Source ↗ |
| Price evidence | Use the current DeepSeek price table; prices are published in CNY and vary by cache status and usage pattern. Source ↗ | Artificial Analysis lists $1.40 input / $4.40 output per 1M tokens for one tracked route. Provider pricing may vary. Source ↗ |
| Best test first | Tool-use continuity, long multi-step coding, and your own API integration path. | Reasoning/coding tasks plus the weight, provider, and license path your team intends to use. |
Interpretation
Do not turn a one-point index gap into a purchase decision.
The 50-versus-51 snapshot is narrow enough that it should start a test plan, not finish one. The index uses a defined suite and may not mirror the tools, prompts, retry behavior, latency budget, or deployment choices in your workload.
Method & sources
Traceable claims, not a synthetic leaderboard.
DeepSeek-specific release and API facts come from its release note and live pricing documentation.
GLM figures and index context come from Artificial Analysis’s GLM-5.2 model page and its methodology article. They are independent tracking sources, not vendor attestations.