Compare AI models
| Specifications | ||
ParametersThe learned values that shape how a model responds. B means billion and T means trillion. For mixture-of-experts models, the total count is larger than the number active for each token. Parameter count alone does not measure quality. | 236B | — |
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. | 128k | 400k |
| API pricingUSD per 1M tokens · lower wins | ||
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 |
| — | $750Azure | |
| Overview | ||
| Company | DeepSeek | OpenAI |
| Release date | Dec 10 2024 | Nov 19 2025 |
| Access | Open Weight | Closed |
| Model details | View model | View model |
Other comparisons
DeepSeek V2.5 (Revised)vsClaude Haiku 5.5GPT-5.1-Codex-MaxvsClaude Haiku 5.5DeepSeek V2.5 (Revised)vsGemini 4 ArgonGPT-5.1-Codex-MaxvsGemini 4 ArgonDeepSeek V2.5 (Revised)vsMuse Spark OpenGPT-5.1-Codex-MaxvsMuse Spark OpenDeepSeek V2.5 (Revised)vsGrok 4.7GPT-5.1-Codex-MaxvsGrok 4.7DeepSeek V2.5 (Revised)vsMistral Large 4GPT-5.1-Codex-MaxvsMistral Large 4DeepSeek V2.5 (Revised)vsKimi K3GPT-5.1-Codex-MaxvsKimi K3Frequently asked questions
DeepSeek V2.5 (Revised) and GPT-5.1-Codex-Max don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. DeepSeek V2.5 (Revised) shipped 344 days before GPT-5.1-Codex-Max, so benchmark comparisons should account for the intervening progress.
Context windows are 128k (DeepSeek V2.5 (Revised)) vs 400k (GPT-5.1-Codex-Max). DeepSeek V2.5 (Revised) is open weight, while GPT-5.1-Codex-Max is closed.
Direct benchmark comparisons are unavailable — DeepSeek V2.5 (Revised) and GPT-5.1-Codex-Max don't publish scores on any of the same benchmarks.