What is the best open-weight reasoning model?
Asked "What is the best open-weight reasoning model?", Copilot and Google AI Mode named 39 distinct names across 15 answers on September 7, 2026, and 15 of them in two or more answers.
Measured acrossCopilotGoogle AI Mode
15 of 39 names confirmed · named in 2 or more of 15 answers · asked September 7, 2026 · 2 engines
The best open-weight reasoning model is Kimi K3 for raw reasoning capability, while Qwen3-Thinking and DeepSeek V4 are strong alternatives for general-purpose reasoning and coding tasks.
- 1DeepSeeknamed in 7 of 15 answers
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- 2Presenc AInamed in 4 of 15 answers
- 3Qwennamed in 4 of 15 answers
- 4Alibabanamed in 3 of 15 answers
- 5GLM-5named in 3 of 15 answers
- 6GitHubnamed in 3 of 15 answers
- 7BenchLMnamed in 3 of 15 answers
- 8Vellum.ainamed in 2 of 15 answers
- 9DeepSeek AInamed in 2 of 15 answers
- 10Modalnamed in 2 of 15 answers
- 11Siliconflownamed in 2 of 15 answers
- 12LLM-Statsnamed in 2 of 15 answers
- 13Z.ainamed in 2 of 15 answers
- 14Faros AInamed in 2 of 15 answers
- 15Context Studiosnamed in 2 of 15 answers
- 16Arun Babynamed in 1 of 15 answersone answer
- 17Kimi K3named in 1 of 15 answersone answer
- 18Kiminamed in 1 of 15 answersone answer
- 19BentoMLnamed in 1 of 15 answersone answer
- 20Datakunamed in 1 of 15 answersone answer
- 21OpenAInamed in 1 of 15 answersone answer
- 22IBMnamed in 1 of 15 answersone answer
- 23Wirednamed in 1 of 15 answersone answer
- 24Llamanamed in 1 of 15 answersone answer
- 25ZAInamed in 1 of 15 answersone answer
LOCKED
The full measurement
- The position each of the 2 engines gave all 39 names.
- How many of the 15 answers named each of them.
- 3 sampled observations behind this ranking, and where the engines disagree.
- Fan-out — the query each engine actually searched.
- Every citation, and the sources nobody cited.