Devstral SmallvsKimi K2
Devstral Small | Kimi K2 | |
|---|---|---|
| Specifications | ||
ParametersA rough measure of how big the model is. More parameters usually means more capable and more expensive to run, though it is a poor guide on its own — a smaller, newer model often beats a larger, older one. | 24B | 1T |
Context windowHow much text the model can hold in mind at once — your question, any documents you attach, the conversation so far, and its own reply. Go past it and the earliest part falls out of view. | — | 128k |
| API pricingUSD per 1M tokens · lower wins | ||
Cheapest inputLowest input rate across third-party providers, excluding the lab itself. The cheapest endpoint may run a quantised build or a shorter context — see "Available from" on the model page. | — | $0.57Novita |
Cheapest outputLowest output rate across third-party providers, excluding the lab itself. May come from a different provider than the cheapest input. | — | $2.30Novita |
| BenchmarksPublished by one model only | ||
BullshitBench v2Nonsense detection — Given a confidently-worded but nonsensical prompt, does the AI spot that it makes no sense and push back — instead of playing along and inventing an answer? The score is how often it clearly called out the nonsense. Higher is better. | — | 10% |
SWE-Bench VerifiedCoding — Real coding tasks pulled from open-source projects — the AI has to find and fix actual bugs. A human-checked version of the original SWE-Bench. Higher is better. | — | 65.8% |
GPQA DiamondScience — Graduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | — | 75.1% |
| Overview | ||
| Company | Mistral | Moonshot AI |
| Release date | May 21 2025 | Jul 11 2025 |
| Access | Open Weight | Open Weight |
Other comparisons
Devstral SmallvsClaude Opus 5Kimi K2vsClaude Opus 5Devstral SmallvsGPT-5.6 SolKimi K2vsGPT-5.6 SolDevstral SmallvsGemini 3.7 FlashKimi K2vsGemini 3.7 FlashDevstral SmallvsMuse GlimmerKimi K2vsMuse GlimmerDevstral SmallvsGrok 4.6Kimi K2vsGrok 4.6Devstral SmallvsDeepSeek-V4-Pro-0813Kimi K2vsDeepSeek-V4-Pro-0813
Frequently asked questions
Devstral Small and Kimi K2 don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Devstral Small shipped 51 days before Kimi K2, so benchmark comparisons should account for the intervening progress.
Devstral Small has 24B parameters, while Kimi K2 has 1T.
Direct benchmark comparisons are unavailable — Devstral Small and Kimi K2 don't publish scores on any of the same benchmarks.
Devstral Small was released by Mistral on May 21 2025.
Kimi K2 was released by Moonshot AI on Jul 11 2025.