Compare AI models
| Specifications | ||
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. | 100k | 400k |
| These models have no shared benchmark scores. | ||
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. | — | 45% |
Next.js EvalsNext.js coding — Vercel's open eval of how well AI coding agents build and migrate real Next.js apps — measured as the share of tasks the agent completes successfully. Higher is better. | — | 46% |
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. | 58.7% | — |
Okapi Multilingual MMLUMultilingual knowledge — five-shot accuracy on the Okapi translations of MMLU used in the Claude 3 model card | 61.2% | — |
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. | 86.7% | — |
| Overview | ||
| Company | Anthropic | OpenAI |
| Release date | Aug 9 2023 | Dec 18 2025 |
| Access | Closed | Closed |
| Model details | View model | View model |
Other comparisons
Claude Instant 1.2vsGemini 4 CarbonGPT-5.2-CodexvsGemini 4 CarbonClaude Instant 1.2vsMuse EmberGPT-5.2-CodexvsMuse EmberClaude Instant 1.2vsGrok 4.7GPT-5.2-CodexvsGrok 4.7Claude Instant 1.2vsDeepSeek-V4.1-Flash-1017GPT-5.2-CodexvsDeepSeek-V4.1-Flash-1017Claude Instant 1.2vsMistral Large 4GPT-5.2-CodexvsMistral Large 4Claude Instant 1.2vsKimi K3.1 ProGPT-5.2-CodexvsKimi K3.1 ProFrequently asked questions
Claude Instant 1.2 and GPT-5.2-Codex don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Claude Instant 1.2 shipped 862 days before GPT-5.2-Codex, so benchmark comparisons should account for the intervening progress.
Context windows are 100k (Claude Instant 1.2) vs 400k (GPT-5.2-Codex).
Direct benchmark comparisons are unavailable — Claude Instant 1.2 and GPT-5.2-Codex don't publish scores on any of the same benchmarks.