LLMs with the longest context window
- models ranked
- 349
- context of #1
- 2M
Context window · read October 20
As of October 20, 2026, SpaceXAI Grok 4.20 has the largest listed context window, 2M tokens, ahead of SpaceXAI Grok 4.20 Multi-Agent (2M) and Meta Llama 4 Scout (1.31M).
| Rank | Model | Context window | Evidence | Coding index | Output $/Mtok |
|---|---|---|---|---|---|
| 1 | Grok 4.20 xAI | 2M | Not benchmarked | $2.50 | |
| 2 | 2M | Not benchmarked | $2.50 | ||
| 3 | Llama 4 Scout Meta Llama | 1.31M | 9.1 | $0.30 | |
| 4 | MiMo-V2.5 Xiaomi | 1.05M | 34.0 | $0.28 | |
| 5 | MiMo-V2.6-Flash Xiaomi | 1.05M | 61.9 | $0.28 | |
| 6 | GPT-6 Luna OpenAI | 1.05M | 71.4 | $0.50 | |
| 7 | GPT-6 Luna Pro OpenAI | 1.05M | Not benchmarked | $0.50 | |
| 8 | MiMo-V2.5-Pro Xiaomi | 1.05M | 40.0 | $0.87 | |
| 9 | MiMo-V2.6-Pro Xiaomi | 1.05M | 72.6 | $0.87 | |
| 10 | GPT-5.6 Luna OpenAI | 1.05M | 61.5 | $1.20 | |
| 11 | GPT-5.6 Luna Pro OpenAI | 1.05M | Not benchmarked | $1.20 | |
| 12 | GPT-6 Sol OpenAI | 1.05M | 82.8 | $10.00 | |
| 13 | GPT-6 Sol Pro OpenAI | 1.05M | Not benchmarked | $10.00 | |
| 14 | GPT-6.1 Sol OpenAI | 1.05M | 88.7 | $10.00 | |
| 15 | GPT-6.1 Sol Pro OpenAI | 1.05M | Not benchmarked | $10.00 | |
| 16 | GPT-5.6 Terra OpenAI | 1.05M | 69.0 | $12.00 | |
| 17 | GPT-5.6 Terra Pro OpenAI | 1.05M | Not benchmarked | $12.00 | |
| 18 | GPT-5.4 OpenAI | 1.05M | 37.7 | $15.00 | |
| 19 | GPT-5.6 Sol OpenAI | 1.05M | 76.7 | $20.00 | |
| 20 | GPT-5.6 Sol Pro OpenAI | 1.05M | Not benchmarked | $20.00 |
How this list is built
Generated from the dataset on every refresh. Nobody picks the order by hand.
Priced models by the context window OpenRouter lists, largest first. Among equal windows the cheaper output price comes first.
- OpenRouter, fetched