Claude 2vsKimi K2 Thinking
Claude 2 | Kimi K2 Thinking | |
|---|---|---|
| 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. | — | 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. | 100k | 256k |
| 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. | — | $0.60Google |
Cheapest outputLowest output rate across third-party providers, excluding the lab itself. May come from a different provider than the cheapest input. | — | $2.50Google |
| BenchmarksPublished by one model only | ||
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. | — | 71.3% |
HumanEvalFunction synthesis — 164 small Python problems: the AI is given a function's description and has to write the working function. This was the coding benchmark of the GPT-3.5 and GPT-4 era, before the field moved to fixing real bugs in real repositories. Higher is better. | 71.2% | — |
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. | 78.5% | — |
GSM8KGrade-school math — Grade-school maths word problems that take a few steps of arithmetic to work through. It separated the models of 2022 and 2023 sharply, then saturated. One caveat on the historical numbers: OpenAI included part of the GSM8K training set in GPT-4's pre-training mix, so GPT-4's score is not a clean few-shot result. Higher is better. | 88% | — |
| Overview | ||
| Company | Anthropic | Moonshot AI |
| Release date | Jul 11 2023 | Nov 6 2025 |
| Access | Proprietary | Open Weight |
Other comparisons
Frequently asked questions
Claude 2 and Kimi K2 Thinking don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Claude 2 shipped 849 days before Kimi K2 Thinking, so benchmark comparisons should account for the intervening progress.
Context windows are 100k (Claude 2) vs 256k (Kimi K2 Thinking). Claude 2 is proprietary, while Kimi K2 Thinking is open weight.
Direct benchmark comparisons are unavailable — Claude 2 and Kimi K2 Thinking don't publish scores on any of the same benchmarks.
Claude 2 was released by Anthropic on Jul 11 2023.
Kimi K2 Thinking was released by Moonshot AI on Nov 6 2025.
Claude 2 has a 100k context window; Kimi K2 Thinking has 256k.
Claude 2 is a proprietary model released by Anthropic. Kimi K2 Thinking is an open weight model released by Moonshot AI.