Windsurf: Gemini 3.1 Pro Now Available

Gemini 3.1 Pro Arrives in Windsurf

Windsurf expanded its AI model selection on February 19, 2026 with the addition of Gemini 3.1 Pro — Google's latest frontier model and one of the strongest reasoning models available as of its release date. The integration gives Windsurf users direct access to the model inside the IDE, with no need to switch between tools or manage API keys manually.

Promotional Pricing for Self-Serve Users

Windsurf introduced Gemini 3.1 Pro with limited-time promotional credit pricing:

• Low Thinking: 0.5x credits
• High Thinking: 1x credits

The Low and High Thinking modes map to the model's adjustable reasoning depth, a key differentiator of Gemini 3.1 Pro. Developers can opt for faster, lighter responses when exploring ideas, or dial up the reasoning budget for tasks that require multi-step planning, architecture decisions, or research synthesis.

About Gemini 3.1 Pro

Released by Google on February 19, 2026, Gemini 3.1 Pro represents a substantial leap over Gemini 3 Pro. The model scores 77.1% on ARC-AGI-2 — more than double the reasoning performance of its predecessor — and 80.6% on SWE-Bench Verified, placing it among the top-performing models for software engineering benchmarks. Google maintained the same pricing structure as Gemini 3 Pro ($2 per million input tokens via API), meaning the performance upgrade comes at no additional cost.

The model's three-tier thinking system is its most notable architectural feature, allowing users and tools to control how much compute the model invests in each response. This makes it particularly well-suited for agentic coding workflows where the appropriate reasoning depth varies depending on the task — from quick autocomplete suggestions to complex refactoring sessions.

Availability

Gemini 3.1 Pro is available to all Windsurf self-serve users immediately upon the February 19 release.