Best AI Models for Long Context

Models ordered by advertised input context window, with their SI Score alongside so you can trade reach against quality.

How this list is ranked. Ordered by the largest advertised input context window. Context figures are provider-published limits, not measured effective context; check each model's sources.

  1. 1 Llama 4 Scout 17B Instruct Metaprovisional 10M 51.0 — 10M
  2. 2 GPT-5.4 OpenAI 1.1M 69.7 $2.50 1.1M
  3. 3 GPT-5.4 Pro OpenAI 1.1M 61.3 $30.00 1.1M
  4. 4 GPT-5.5 OpenAI 1.1M 69.5 $5.00 1.1M
  5. 5 GPT-5.5 Pro OpenAI 1.1M 63.5 $30.00 1.1M
  6. 6 GPT-5.6 Luna OpenAIprovisional 1.1M 63.4 $0.20 1.1M
  7. 7 GPT-5.6 Sol OpenAIprovisional 1.1M 72.1 $4.00 1.1M
  8. 8 GPT-5.6 Terra OpenAIprovisional 1.1M 68.2 $2.00 1.1M
  9. 9 GPT-6 Astra OpenAI 1.1M 77.5 $10.00 1.1M
  10. 10 GPT-6 Luna OpenAI 1.1M 61.6 $0.10 1.1M
  11. 11 GPT-6 Sol OpenAI 1.1M 68.9 $2.00 1.1M
  12. 12 GPT-6.1 Sol OpenAI 1.1M 73.0 $2.00 1.1M
  13. 13 Gemini 2.5 Pro Google 1M 45.2 $1.25 1M
  14. 14 Gemini 3 Flash Preview Googleprovisional 1M 54.8 $0.50 1M
  15. 15 Gemini 3 Pro Preview Googleprovisional 1M 58.6 — 1M

Updated Oct 9, 2026. Task lists rank on one stated measure rather than the blended SI Score. See the methodology for how pillars and confidence are computed; a dash means the source has not reported that value.

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