Claude 2.1vsGPT-4o
Claude 2.1 | GPT-4o | |
|---|---|---|
| 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 | 128k |
| 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. | — | $2.50 |
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. | — | $10.00 |
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. | — | $1.25 |
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. | — | $2.50Azure |
Cheapest outputLowest output rate across third-party providers, excluding the lab itself. May come from a different provider than the cheapest input. | — | $10.00Azure |
| 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. | — | 12% |
GPQA DiamondScience — Graduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | — | 49.9% |
| Overview | ||
| Company | Anthropic | OpenAI |
| Release date | Nov 21 2023 | May 13 2024 |
| Access | Proprietary | Proprietary |
Other comparisons
Frequently asked questions
Claude 2.1 and GPT-4o don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Only GPT-4o has a verified first-party API price: $2.50 per million input tokens and $10.00 per million output tokens. No pay-as-you-go API rate is tracked for Claude 2.1. Claude 2.1 shipped 174 days before GPT-4o, so benchmark comparisons should account for the intervening progress.
Context windows are 200k (Claude 2.1) vs 128k (GPT-4o).
Direct benchmark comparisons are unavailable — Claude 2.1 and GPT-4o don't publish scores on any of the same benchmarks.
Claude 2.1 was released by Anthropic on Nov 21 2023.
GPT-4o was released by OpenAI on May 13 2024.
Only GPT-4o has a verified first-party API price: $2.50 per million input tokens and $10.00 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; GPT-4o has 128k.