Compare AI models
| Specifications | ||
ParametersThe learned values that shape how a model responds. B means billion and T means trillion. For mixture-of-experts models, the total count is larger than the number active for each token. Parameter count alone does not measure quality. | 671B | 1T |
Context windowHow much information the model can work with in one request, measured in tokens — pieces of words or other data. This includes your question, attachments, conversation and reply. Limits can vary by model variant and provider. | 128k | 256k |
| API pricingUSD per 1M tokens · lower wins | ||
Cheapest inputLowest input rate across every provider on OpenRouter, the lab included. The cheapest endpoint may run a quantised build or a shorter context — see "Available from" on the model page. | $0.256DeepInfra | $0.60Novita |
Cheapest outputLowest output rate across every provider on OpenRouter, the lab included. May come from a different provider than the cheapest input. | $0.712DeepInfra | $2.50Novita |
| $103StreamLake | $245Novita · fp8 | |
| Benchmarks | ||
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. | 42% | 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. | 59.1% | 75.1% |
LiveCodeBenchCompetitive coding — Coding problems published so recently the AI can't have seen them in training — a contamination-free test of raw programming skill. Higher is better. | 40.5% | — |
MMLUGeneral knowledge — A 57-subject multiple-choice exam — history, law, medicine, maths — that was the standard measure of how much a model knows from 2020 until roughly 2024, when frontier scores crowded into the high 80s and labs moved on to harder tests. The scores here were published years apart under different testing setups, so read them as a historical record rather than a like-for-like ranking. Higher is better. | 88.5% | — |
| Overview | ||
| Company | DeepSeek | Moonshot AI |
| Release date | Dec 26 2024 | Sep 5 2025 |
| Access | Open Weight | Open Weight |
| Model details | View model | View model |
Other comparisons
DeepSeek V3 ChatvsClaude Haiku 5.5Kimi K2 (0905)vsClaude Haiku 5.5DeepSeek V3 ChatvsGPT-6.1 SolKimi K2 (0905)vsGPT-6.1 SolDeepSeek V3 ChatvsGemini 4 ArgonKimi K2 (0905)vsGemini 4 ArgonDeepSeek V3 ChatvsMuse Spark OpenKimi K2 (0905)vsMuse Spark OpenDeepSeek V3 ChatvsGrok 4.7Kimi K2 (0905)vsGrok 4.7DeepSeek V3 ChatvsMistral Large 4Kimi K2 (0905)vsMistral Large 4Frequently asked questions
Kimi K2 (0905) leads DeepSeek V3 Chat on 2 of the 2 benchmarks they both report (SWE-Bench Verified, GPQA Diamond). DeepSeek V3 Chat shipped 253 days before Kimi K2 (0905), so benchmark comparisons should account for the intervening progress.
DeepSeek V3 Chat has 671B parameters, while Kimi K2 (0905) has 1T. Context windows are 128k (DeepSeek V3 Chat) vs 256k (Kimi K2 (0905)).
On SWE-Bench Verified, Kimi K2 (0905) leads at 65.8% vs DeepSeek V3 Chat at 42%. On GPQA Diamond, Kimi K2 (0905) leads at 75.1% vs DeepSeek V3 Chat at 59.1%.