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14 approved models · 3 providers

AI model context windows

Compare context window sizes and tokenizer notes for the models we track. Each figure links to its source. The counter runs in your browser, so your text isn’t uploaded.

OpenAI

GPT-6 Astra

1,050,000 context · labeled estimate

GPT-5.6 Sol

1,050,000 context · verified local tokens

GPT-5.6 Terra

1,050,000 context · verified local tokens

GPT-5.6 Luna

1,050,000 context · verified local tokens

Anthropic

Claude Fable 5.1

1,000,000 context · labeled estimate

Claude Opus 5.5

1,000,000 context · labeled estimate

Claude Sonnet 5.5

1,000,000 context · labeled estimate

Claude Haiku 5.5

1,000,000 context · labeled estimate

Claude Fable 5

1,000,000 context · labeled estimate

Claude Opus 5

1,000,000 context · labeled estimate

Claude Sonnet 5

1,000,000 context · labeled estimate

Claude Haiku 4.5

200,000 context · labeled estimate

Meta

Llama 4 Maverick

1,000,000 context · labeled estimate

Llama 4 Scout

10,000,000 context · labeled estimate

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