This release has been yanked by its maintainers, and will be ignored by installers, except when explicitly specified.
Consider using release 2026.10.20.4 instead.
ctxlen
A simple library to look up the context limits (input and output tokens) of LLMs.
uv add ctxlen
>>> import ctxlen
>>> ctxlen.max_input("claude-opus-5-5"), ctxlen.max_output("claude-opus-5-5")
(1000000, 128000)
>>> ctxlen.max_input("anthropic/claude-sonnet-5-5")
1000000
>>> ctxlen.max_input("gpt-6-sol"), ctxlen.max_output("gpt-6-sol")
(922000, 128000)
>>> ctxlen.max_input("openai/gpt-6-luna")
922000
The numbers come from litellm and models.dev; their notices are in LICENSE.
1 maintainer
Metadata
1 maintainer
Release files for ctxlen 2026.10.11.dev3
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