> ## Documentation Index
> Fetch the complete documentation index at: https://docs.zencoder.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# July 2026

> Reasoning effort selection, Claude Fable 5 and Sonnet 5 in Claude Code, and GPT-5.6 in OpenAI Codex

## New Models and Finer-Grained Reasoning Control

July 2026 lets you choose reasoning effort for supported models, brings Claude Fable 5 and Sonnet 5 to Claude Code, and adds GPT-5.6 support in OpenAI Codex.

## New Features

### Choose Reasoning Effort for Supported Models

<Card title="Tune How Hard the Model Thinks" icon="brain" color="#F24A07">
  Select the reasoning effort level for models that support it.
</Card>

You can now **choose reasoning effort** for supported models, letting you balance response depth against speed depending on the task at hand.

***

### Claude Fable 5 and Sonnet 5 in Claude Code

**Claude Fable 5** and **Sonnet 5** are now available in Claude Code, bringing Anthropic's latest models to your CLI workflows.

***

### GPT-5.6 in OpenAI Codex

<Card title="Latest OpenAI Model" icon="sparkles" color="#9333EA">
  GPT-5.6 is now available in OpenAI Codex.
</Card>

**GPT-5.6 is now available in OpenAI Codex**, giving Codex users access to OpenAI's latest frontier model.

***

## Bug Fixes

* Various bug fixes and stability improvements

***

<Accordion title="Version History">
  <Tabs>
    <Tab title="VS Code">
      * **3.68** (July 10, 2026)
      * **3.64** (July 7, 2026)
    </Tab>

    <Tab title="JetBrains">
      * **3.31.0** (July 10, 2026)
      * **3.30.0** (July 7, 2026)
    </Tab>
  </Tabs>
</Accordion>

***

*Questions or feedback? Join our [Discord community](https://discord.gg/YjNYBHg8Vb) or visit our [Community Support](/get-started/community-support) page.*


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