Claude 2.1vso1
Claude 2.1 | o1 | |
|---|---|---|
| Specifications | ||
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. | 200k | 200k |
| API pricingUSD per 1M tokens · lower wins | ||
Input priceWhat you pay for everything you send the model — your question, plus any documents or earlier conversation you include with it. | — | $15.00 |
Output priceWhat you pay for the text the model writes back. It is normally the dearer half: producing an answer costs more than reading one. | — | $60.00 |
Cached input priceA reduced rate for text you send over and over. If every request starts with the same instructions or the same document, the provider keeps a copy ready and charges less to read it again. | — | $7.50 |
| BenchmarksPublished by one model only | ||
GPQA DiamondScience — Graduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | — | 75.7% |
| Overview | ||
| Company | Anthropic | OpenAI |
| Release date | Nov 21 2023 | Dec 5 2024 |
| Access | Proprietary | Proprietary |
Other comparisons
Frequently asked questions
Claude 2.1 and o1 don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Only o1 has a verified first-party API price: $15.00 per million input tokens and $60.00 per million output tokens. No pay-as-you-go API rate is tracked for Claude 2.1. Claude 2.1 shipped 380 days before o1, so benchmark comparisons should account for the intervening progress.
Context windows are 200k (Claude 2.1) vs 200k (o1).
Direct benchmark comparisons are unavailable — Claude 2.1 and o1 don't publish scores on any of the same benchmarks.
Claude 2.1 was released by Anthropic on Nov 21 2023.
o1 was released by OpenAI on Dec 5 2024.
Only o1 has a verified first-party API price: $15.00 per million input tokens and $60.00 per million output tokens. No pay-as-you-go API rate is tracked for Claude 2.1. Rates are pay-as-you-go API prices verified on August 18, 2026.
Claude 2.1 has a 200k context window; o1 has 200k.