DeepSeek Reasoner
DeepSeek's thinking lane with the same low price structure and a much larger output ceiling than chat mode.
Pricing
Input$0.028 / 1M cache hit, $0.28 / 1M cache miss
Cached input$0.028 / 1M
Output$0.42 / 1M
Same published rates as chat mode on the referenced pricing page.
Cost bandUltra-budget
Free tierPaid API.
Limits
Context window128k
Max output64k
Knowledge cutoffNot surfaced in pricing page
DeploymentDeepSeek API
OpenAI-compatible APIYes
ModalitiesText
Where it fits
Best forCheap reasoning runs, structured analysis, and experiments where you want maximal tokens per dollar.
Business fitCompelling on price, but selection should include governance and platform-risk review.
Capabilities
JSON outputTool callsPrefix completion
Benchmark scores
Composite88 / 100
Coding84 / 100 (SWE-bench Verified)
Reasoning96 / 100 (GPQA Diamond)
Long context80 / 100 (RULER 64K)
Vision64 / 100
Instruction following82 / 100 (IFEval)
Editorial aggregate of published benchmark results as of Oct 1, 2025. These are not independent measurements run by this site.
Change history
- Jul 19, 2026DeprecatedDeepSeek Reasoner API name retires Jul 24, 2026 DeepSeek retires the deepseek-reasoner model name on 2026-07-24 15:59 UTC; requests fold into deepseek-v4-flash (thinking and non-thinking modes). DeepSeek API docs
Data
Last checkedMar 31, 2026
Verify with provider documentation before committing spend. Report an error and it gets fixed with a logged correction.