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 GPT-5.5OpenAI | GPT-5 OpenAI |  DeepSeek-V3.1DeepSeek |  Claude 4.5 HaikuAnthropic | |
|---|---|---|---|---|
| Vendor | OpenAI | OpenAI | DeepSeek | Anthropic |
| Family | GPT | GPT | DeepSeek | Claude |
| Release date | 2026-04-23 | 2025-08-07 | 2025-08-21 | 2025-10-01 |
| Context window | 400,000 tokens | 400,000 tokens | 128,000 tokens | 200,000 tokens |
| Parameters | — | — | 671B | — |
| Modality | text, vision, audio | text, vision, audio | text | text, vision |
| License | proprietary | proprietary | MIT | proprietary |
| Source | proprietary | proprietary | open weights | proprietary |
| Description | OpenAI's smartest and most intuitive model — successor to GPT-5, with major coding, research, and document workflow gains. GPT-5.5 Pro variant also available for heavier reasoning. | OpenAI's flagship general-purpose model. Superseded by GPT-5.5 in April 2026. | Large MoE open-weight model. Predecessor to DeepSeek-V4. | Fast, cost-effective Claude model. |
| Links | ||||
| Benchmarks | ||||
| MMLU-Pro | 87.6% | 85.1% | — | — |
| GPQA-D | 89.4% | 87.3% | — | — |
| HumanEval | 96.8% | 95.2% | — | — |
| Aider | 89.7% | 85.4% | — | — |
| AIME-25 | 94.2% | 91.0% | — | — |
| LiveCB | 78.9% | 74.5% | — | — |
| MMMU | 78.4% | 74.1% | — | — |
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Claude 4.8 Opusmax
Qwen3.7-Maxmax
Gemini 3.5maxGemini OmnimaxGPT-5.5✓Qwen3.6-27BmaxDeepSeek-V4-FlashmaxDeepSeek-V4-PromaxGemini 3 PromaxClaude 4.7 OpusmaxClaude 4.6 SonnetmaxClaude 4.5 Haiku✓DeepSeek-V3.1✓GPT-5✓
Grok 4maxGemini 2.5 FlashmaxQwen3 235Bmaxo3maxGPT-4.1max
Llama 4 ScoutmaxLlama 4 MaverickmaxGemini 2.5 PromaxDeepSeek-R1max
Mistral Large 2maxMax 4 models. Remove one to add another.