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Issue 76 2026-03-17

Llm Tool Release And Expanded Openai Model Id Support

Issue 76 Edition 2026-03-17 3 min read
Not accepted General
Sources: 1 • Confidence: Medium • Updated: 2026-04-12 10:16

Key takeaways

  • Version 0.29 of the llm tool has been released.
  • llm 0.29 adds support for OpenAI models gpt-5.4, gpt-5.4-mini, and gpt-5.4-nano.

Sections

Llm Tool Release And Expanded Openai Model Id Support

  • Version 0.29 of the llm tool has been released.
  • llm 0.29 adds support for OpenAI models gpt-5.4, gpt-5.4-mini, and gpt-5.4-nano.

Unknowns

  • What specific changes (features, bug fixes, breaking changes, deprecations) are included in llm 0.29 beyond the added model ID support?
  • What is the exact configuration and provider setup required in llm 0.29 to successfully call gpt-5.4, gpt-5.4-mini, and gpt-5.4-nano?
  • Are there any constraints (rate limits, access gating, authentication requirements) that affect whether these model IDs can be used through llm 0.29?
  • Is there any direct decision read-through (operator, product, or investor) described in the corpus tied to the llm 0.29 release?

Investor overlay

Read-throughs

  • Developer tooling around OpenAI models is being updated to recognize gpt-5.4, gpt-5.4-mini, and gpt-5.4-nano, suggesting ecosystem alignment toward these model IDs once users upgrade to llm 0.29.
  • If llm users adopt 0.29, it could enable incremental usage of the newly supported model IDs through this tool, contingent on correct configuration and upstream availability.

What would confirm

  • llm 0.29 release notes or changelog detailing the OpenAI provider configuration required to call gpt-5.4, gpt-5.4-mini, and gpt-5.4-nano successfully.
  • Reports or documentation showing these model IDs are generally available to users, including any stated access requirements or gating that affects successful calls via llm 0.29.
  • Adoption evidence such as community posts, examples, or usage metrics indicating llm users are successfully running workloads against the newly supported model IDs after upgrading.

What would kill

  • Evidence that llm 0.29 only adds model name recognition without functional support, or that configuration and provider setup is incomplete or undocumented for these model IDs.
  • Indications that the model IDs are not accessible to typical users due to rate limits, authentication constraints, or access gating, limiting practical impact of the llm 0.29 update.
  • Clarification that no additional features, fixes, or decision-relevant changes exist in llm 0.29 beyond model ID support, reducing any broader read-through.

Sources

  1. 2026-03-17 simonwillison.net