Mistral Vibe: Reasoning Support with Extended Thinking
Mistral VibeMistral Vibe 1.3.0 adds reasoning support, enabling the coding agent to display chain-of-thought reasoning traces from compatible models. This release also introduces native terminal theme support, agentskills.io compatibility, and improved tool UI rendering, marking a significant step forward in the agent's transparency and capability.
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Reasoning Support Arrives in Mistral Vibe 1.3.0
Released on December 23, 2025, Mistral Vibe 1.3.0 introduced reasoning support, allowing the coding agent to leverage and display extended thinking capabilities from compatible Mistral models. This feature aligns Mistral Vibe with a broader industry trend toward transparent AI reasoning in developer tools.
What Reasoning Support Means
With reasoning support enabled, Mistral Vibe can surface the chain-of-thought process that the underlying model uses when tackling complex coding tasks. Rather than presenting only the final answer, the agent can show the step-by-step reasoning that led to a particular code suggestion, architectural decision, or debugging conclusion.
This feature builds on Mistral's reasoning model capabilities. Devstral 2, the model family powering Mistral Vibe, emphasizes long-context reasoning, structured tool use, multi-file modifications, and predictable step-by-step behavior — all features intended for production development workflows.
User-Definable Reasoning Field
A follow-up release (v1.3.2 on December 24, 2025) added a user-definable reasoning field, giving developers control over how reasoning content is structured and displayed. This customization option allows teams to tailor the reasoning output to their specific debugging and review workflows.
Additional Features in 1.3.0
The same release included several other notable additions:
- agentskills.io Support: Compatibility with the agentskills.io standard for skill definitions, an early step toward the cross-agent interoperability that would expand further in v2.0 and v2.2.
- Native Terminal Theme Support: The CLI gained native theming capabilities, allowing the interface to adapt to different terminal color schemes.
- Improved Tool UI System: Better rendering and organization for tool outputs, making it easier to follow the agent's actions during complex multi-tool operations.
Context in the Coding Agent Landscape
Reasoning support in Mistral Vibe arrived at a time when competing tools like Claude Code and Cursor were also investing in extended thinking features. The ability to show reasoning traces gives developers greater confidence in AI-generated code suggestions and helps them understand when the model might be making incorrect assumptions.