# Claude 3 opus - Context length?

**URL:** <https://forum.cursor.com/t/claude-3-opus-context-length/5465>\
**Category:** Help\
**Created:** [May 31, 2024, 2:48pm UTC](https://forum.cursor.com/t/claude-3-opus-context-length/5465 "2024-05-31T14:48:07Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![IWelcomeAIOverlords](https://avatars.discourse-cdn.com/v4/letter/i/cc9497/32.png) [@IWelcomeAIOverlords](https://forum.cursor.com/u/IWelcomeAIOverlords)\
**Post date:** [May 31, 2024, 2:48pm UTC](https://forum.cursor.com/t/claude-3-opus-context-length/5465/1 "2024-05-31T14:48:07Z")

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What is the context length of this? Is it possible for a long context version of this model? I know that Opus is very expensive to use, but I’m just curious.

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**Author:** ![fun\_strange](https://avatars.discourse-cdn.com/v4/letter/f/8c91f0/32.png) [@fun\_strange](https://forum.cursor.com/u/fun_strange)\
**Post date:** [May 31, 2024, 3:59pm UTC](https://forum.cursor.com/t/claude-3-opus-context-length/5465/2 "2024-05-31T15:59:55Z")

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For a long context Claude opus you can try this with your own API key:

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**Author:** ![fun\_strange](https://avatars.discourse-cdn.com/v4/letter/f/8c91f0/32.png) [@fun\_strange](https://forum.cursor.com/u/fun_strange)\
**Post date:** [May 31, 2024, 4:00pm UTC](https://forum.cursor.com/t/claude-3-opus-context-length/5465/3 "2024-05-31T16:00:39Z")

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> [@\[Solved\] Please add claude-3-opus-200k and gpt-4-turbo-128k (and gpt-4-vision-128k) to Long Context Chat when on our own API key](https://forum.cursor.com/t/solved-please-add-claude-3-opus-200k-and-gpt-4-turbo-128k-and-gpt-4-vision-128k-to-long-context-chat-when-on-our-own-api-key/3948):
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> It’s fantastic that you’ve implemented the long context chat feature! This is a great addition to the platform. To further enhance the user experience, could you please also add support for those Anthropic and OpenAI models? It should be a relatively straightforward change to include claude-3-opus-200k and gpt-4-turbo-128k (and gpt-4-vision-128k) when the “Anthropic API key” or “OpenAI API key” options are toggled. Edit: it seems to be possible, I’ve just added claude-3-opus-200k to models, and…

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**Author:** ![system](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/system/32/99069_2.png) [@system](https://forum.cursor.com/u/system)\
**Post date:** [June 18, 2026, 10:13am UTC](https://forum.cursor.com/t/claude-3-opus-context-length/5465/4 "2026-06-18T10:13:16Z")

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Closed on June 18, 2026, 10:13am UTC