LLMs with the largest context window (Nov 2026)
How much text a model can read in one request, from the largest window down - with the price, so you can see what a long context actually costs.
The largest window today belongs to Grok 4.20 Multi-Agent: 2,000,000 tokens, at $1.25 / $2.5 per million tokens.
Data updated 2026-11-11 - 20 models - source: public OpenRouter model list, refreshed daily. Prices in USD per million tokens.
| # | Model | Vendor | Input | Output | Blended | Context | Max out | Features | 30-day range (out) |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Grok 4.20 Multi-Agent | xAI | $1.25 | $2.5 | $1.56 | 2M | 1.8M | reasoning, vision | stable |
| 2 | Grok 4.20 | xAI | $1.25 | $2.5 | $1.56 | 2M | 1.8M | reasoning, tools, vision | stable |
| 3 | MiMo-V2.6-Flash | Xiaomi | $0.14 | $0.28 | $0.175 | 1.05M | 131K | reasoning, tools, vision, audio, video | stable |
| 4 | GPT-6 Luna Pro | OpenAI | $0.1 | $0.5 | $0.2 | 1.05M | 128K | reasoning, tools, vision | stable |
| 5 | GPT-6 Luna | OpenAI | $0.1 | $0.5 | $0.2 | 1.05M | 128K | reasoning, tools, vision | stable |
| 6 | GPT-5.6 Luna Pro | OpenAI | $0.2 | $1.2 | $0.45 | 1.05M | 128K | reasoning, tools, vision | stable |
| 7 | GPT-5.6 Luna | OpenAI | $0.2 | $1.2 | $0.45 | 1.05M | 128K | reasoning, tools, vision | stable |
| 8 | MiMo-V2.6-Pro | Xiaomi | $0.435 | $0.87 | $0.544 | 1.05M | 131K | reasoning, tools, vision, audio, video | stable |
| 9 | GPT-6.1 Terra Pro | OpenAI | $1 | $5 | $2 | 1.05M | 128K | reasoning, tools, vision | stable |
| 10 | GPT-6.1 Terra | OpenAI | $1 | $5 | $2 | 1.05M | 128K | reasoning, tools, vision | stable |
| 11 | GPT-6.1 Sol Pro | OpenAI | $2 | $10 | $4 | 1.05M | 128K | reasoning, tools, vision | stable |
| 12 | GPT-6.1 Sol | OpenAI | $2 | $10 | $4 | 1.05M | 128K | reasoning, tools, vision | stable |
| 13 | GPT-6 Sol Pro | OpenAI | $2 | $10 | $4 | 1.05M | 128K | reasoning, tools, vision | stable |
| 14 | GPT-6 Sol | OpenAI | $2 | $10 | $4 | 1.05M | 128K | reasoning, tools, vision | stable |
| 15 | GPT-5.6 Terra Pro | OpenAI | $2 | $12 | $4.5 | 1.05M | 128K | reasoning, tools, vision | stable |
| 16 | GPT-5.6 Terra | OpenAI | $2 | $12 | $4.5 | 1.05M | 128K | reasoning, tools, vision | stable |
| 17 | GPT-5.4 | OpenAI | $2.5 | $15 | $5.63 | 1.05M | 128K | reasoning, tools, vision | stable |
| 18 | GPT-5.6 Sol Pro | OpenAI | $4 | $20 | $8 | 1.05M | 128K | reasoning, tools, vision | $10 - $20 * |
| 19 | GPT-5.6 Sol | OpenAI | $4 | $20 | $8 | 1.05M | 128K | reasoning, tools, vision | $10 - $20 * |
| 20 | GPT-5.5 | OpenAI | $5 | $30 | $11.25 | 1.05M | 128K | reasoning, tools, vision | stable |
Blended = (3 x input + output) / 4. Context and max output in tokens (K = thousand, M = million). * Volatile: the output price moved by 30% or more in the last 30 days, usually because OpenRouter routes the model to a different provider.
Head-to-head comparisons for models in this list
- GPT-6.1 Sol vs GPT-6 Astra
- GPT-6.1 Sol vs GPT-6 Sol
- GPT-6.1 Sol vs Claude Sonnet 5.5
- GPT-6.1 Sol vs Claude Opus 5.5
- GPT-6.1 Sol vs Gemini 4 Argon
- Grok 4.7 vs GPT-6.1 Sol
- DeepSeek V4 Pro vs GPT-6.1 Sol
- Kimi K3 vs GPT-6.1 Sol
- Qwen3.8 Max vs GPT-6.1 Sol
- GPT-6 Luna vs Gemini 3.8 Flash
Other lists
- Cheapest LLM APIs
- Cheapest 1M-context models
- Cheapest reasoning models
- Cheapest vision models
- Free LLM APIs
- OpenAI models by price
- Claude models by price
- Gemini models by price
- DeepSeek models by price
- Grok models by price
- Qwen models by price
How we rank
The list includes text models from established vendors that OpenRouter added in the last 12 months, with at least a 32,000-token window. Batch, preview, experimental and image or audio generation variants are left out; batch prices appear in their own column on vendor pages. Prices are the current per-token list rates; for open-weight models served by several hosts, OpenRouter shows the price of the provider it currently routes to, which is why some of them move often. Need a full cost estimate? Use the AI cost calculator or browse the full model atlas.
Frequently asked questions
Which LLM has the largest context window?
As of 11 Nov 2026, Grok 4.20 Multi-Agent has the largest context window in this list: 2,000,000 tokens, at $1.25 per million input tokens and $2.5 per million output tokens.
How is the ranking calculated?
Models are sorted by the maximum number of input tokens they accept; ties are broken by the blended price (three input tokens for every output token).
How often is this list updated?
Every day. Prices, context windows and features come from the public OpenRouter model list, refreshed each morning; the date at the top of the page shows the last update.
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