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 o3OpenAI |  DeepSeek-V4-ProDeepSeek | DeepSeek-V4-Flash DeepSeek |  Claude 4.5 HaikuAnthropic | |
|---|---|---|---|---|
| Vendor | OpenAI | DeepSeek | DeepSeek | Anthropic |
| Family | o-series | DeepSeek | DeepSeek | Claude |
| Release date | 2025-04-16 | 2026-04-22 | 2026-04-22 | 2025-10-01 |
| Context window | 200,000 tokens | 1,000,000 tokens | 1,000,000 tokens | 200,000 tokens |
| Parameters | — | 1.6T (49B active) | 284B (13B active) | — |
| Modality | text, vision | text | text | text, vision |
| License | proprietary | MIT | MIT | proprietary |
| Source | proprietary | open weights | open weights | proprietary |
| Description | Reasoning-focused model in the o-series. | DeepSeek's flagship open-weight MoE. 1.6T parameters with 49B activated, 1M-token context, and a hybrid attention scheme (CSA + HCA) that delivers long-context inference at ~27% of V3.2's FLOPs. | Smaller, faster sibling to DeepSeek-V4-Pro. Same 1M context window with a much lighter 284B / 13B-active MoE. | Fast, cost-effective Claude model. |
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Gemini 2.5 FlashmaxClaude 4.6 SonnetmaxGPT-5.5maxDeepSeek-V4-Flash✓
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Grok 4maxQwen3 235Bmaxo3✓GPT-4.1max
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Mistral Large 2maxMax 4 models. Remove one to add another.