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 GPT-5.5OpenAI | o3 OpenAI |  DeepSeek-V4-FlashDeepSeek |  Gemini 2.5 Flash | |
|---|---|---|---|---|
| Vendor | OpenAI | OpenAI | DeepSeek | |
| Family | GPT | o-series | DeepSeek | Gemini |
| Release date | 2026-04-23 | 2025-04-16 | 2026-04-22 | 2025-06-17 |
| Context window | 400,000 tokens | 200,000 tokens | 1,000,000 tokens | 1,000,000 tokens |
| Parameters | — | — | 284B (13B active) | — |
| Modality | text, vision, audio | text, vision | text | text, vision, audio |
| 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. | Reasoning-focused model in the o-series. | Smaller, faster sibling to DeepSeek-V4-Pro. Same 1M context window with a much lighter 284B / 13B-active MoE. | Google's cost-and-latency-optimized Gemini 2.5 variant. Generally available June 2025 — designed for high-throughput agentic workflows with sub-second first-token latency. |
| Links | ||||
| Benchmarks | ||||
| MMLU-Pro | 87.6% | — | — | — |
| GPQA-D | 89.4% | 87.7% | — | — |
| HumanEval | 96.8% | — | — | — |
| Aider | 89.7% | — | — | — |
| AIME-25 | 94.2% | 88.9% | — | — |
| LiveCB | 78.9% | — | — | — |
| MMMU | 78.4% | — | — | — |
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Claude 4.8 Opusmax
Qwen3.7-MaxmaxGemini 3.5maxGemini OmnimaxGPT-5.5✓Qwen3.6-27BmaxDeepSeek-V4-Flash✓DeepSeek-V4-PromaxGemini 3 PromaxClaude 4.7 OpusmaxClaude 4.6 SonnetmaxClaude 4.5 HaikumaxDeepSeek-V3.1maxGPT-5max
Grok 4maxGemini 2.5 Flash✓Qwen3 235Bmaxo3✓GPT-4.1max
Llama 4 ScoutmaxLlama 4 MaverickmaxGemini 2.5 PromaxDeepSeek-R1max
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