Compare AI models
| 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. | — | $1.25 |
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. | — | $0.125 |
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. | — | $1.25Azure |
Cheapest outputLowest output rate across every provider on OpenRouter, the lab included. May come from a different provider than the cheapest input. | — | $10.00Azure |
| — | $750OpenAI list price | |
| Benchmarks | ||
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. | 15% | 21% |
| Overview | ||
| Company | OpenAI | |
| Release date | Jan 30 2025 | Aug 7 2025 |
| Access | Closed | Closed |
| Model details | View model | View model |
Other comparisons
Gemini 2.0 FlashvsClaude Haiku 5.5GPT-5vsClaude Haiku 5.5Gemini 2.0 FlashvsMuse WonderGPT-5vsMuse WonderGemini 2.0 FlashvsGrok 4.7GPT-5vsGrok 4.7Gemini 2.0 FlashvsDeepSeek-V4.1-FlashGPT-5vsDeepSeek-V4.1-FlashGemini 2.0 FlashvsMistral Large 4GPT-5vsMistral Large 4Gemini 2.0 FlashvsKimi K3GPT-5vsKimi K3Frequently asked questions
GPT-5 leads Gemini 2.0 Flash on 1 of the 1 benchmark they both report (BullshitBench v2). Only GPT-5 has a verified first-party API price: $1.25 per million input tokens and $10.00 per million output tokens. No pay-as-you-go API rate is tracked for Gemini 2.0 Flash. Gemini 2.0 Flash shipped 189 days before GPT-5, so benchmark comparisons should account for the intervening progress.
Published specifications for these two models are limited — see each model page for the latest details.
On BullshitBench v2, GPT-5 leads at 21% vs Gemini 2.0 Flash at 15%.