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 GPT-5 ProOpenAI |  Gemini 3.5 Flash | GPT-5.5 OpenAI |  Grok 4xAI | |
|---|---|---|---|---|
| Vendor | OpenAI | OpenAI | xAI | |
| Family | GPT | Gemini | GPT | Grok |
| Release date | 2025-08-07 | 2026-05-20 | 2026-04-23 | 2025-07-09 |
| Context window | 400,000 tokens | — | 400,000 tokens | 256,000 tokens |
| Parameters | — | — | — | — |
| Modality | text, vision, audio | text, vision, audio | text, vision, audio | text |
| License | proprietary | proprietary | proprietary | proprietary |
| Source | proprietary | proprietary | proprietary | proprietary |
| Description | Higher-reasoning variant of GPT-5, used for harder scientific and research tasks (e.g., immunology breakthroughs at NIH). Same 400K context as GPT-5; trades latency for depth. | Fast, low-cost tier of the Gemini 3.5 family announced at Google I/O 2026. June 2026 update added native computer-use capability, moving Flash from generation to agentic task execution. | 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. | — |
| Links | ||||
| Benchmarks | ||||
| MMLU-Pro | — | — | 87.6% | 82.8% |
| GPQA-D | — | — | 89.4% | 87.5% |
| HumanEval | — | — | 96.8% | — |
| Aider | — | — | 89.7% | 72.5% |
| AIME-25 | — | — | 94.2% | 86.1% |
| LiveCB | — | — | 78.9% | 65.3% |
| MMMU | — | — | 78.4% | — |
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GPT-5.6 Solmax
Claude 4.8 Opusmax
Qwen3.7-MaxmaxGemini 3.5 Flash✓Gemini 3.5maxGemini OmnimaxGPT-5.5✓
DeepSeek-V4-FlashmaxGemini 3 PromaxDeepSeek-V4-PromaxQwen3.6-27BmaxClaude 4.7 OpusmaxClaude 4.6 SonnetmaxClaude 4.5 HaikumaxDeepSeek-V3.1maxGPT-5 Pro✓GPT-5maxGrok 4✓Gemini 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.