GPT-5.4 Now Available with Multi-Level Reasoning
WindsurfWindsurf added GPT-5.4 to its model lineup on March 5, 2026, making OpenAI's latest frontier model available directly within the IDE with limited-time promotional pricing for self-serve users. GPT-5.4 supports five reasoning effort levels — No Reasoning, Low, Medium, High, and Extra High — with credit costs scaling from 1x to 8x accordingly. GPT-5.4 Low is also integrated into Arena Mode's Frontier and Hybrid Battle Groups.
Sources & Mentions
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GPT-5.4 Arrives in Windsurf
Windsurf has integrated GPT-5.4, OpenAI's latest frontier model, making it available to Pro, Teams, Enterprise, and Trial users as of March 5, 2026.
Reasoning Effort Levels
GPT-5.4 is Windsurf's first GPT model integration to expose five distinct reasoning effort levels:
- No Reasoning / Low Reasoning — 1x credits
- Medium Reasoning — 2x credits
- High Reasoning — 3x credits
- Extra High Reasoning — 8x credits
This tiered system lets developers choose the right tradeoff between speed, credit consumption, and reasoning depth depending on the complexity of the task.
Arena Mode Integration
GPT-5.4 Low has been added to Windsurf's Arena Mode Frontier and Hybrid Battle Groups, meaning it will appear as an anonymous challenger in side-by-side model competitions directly within the IDE.
Promotional Pricing
For a limited time, Windsurf is offering self-serve users promotional credit pricing on GPT-5.4. The No and Low reasoning tiers start at 1x credits.
About GPT-5.4
GPT-5.4 is OpenAI's most capable unified model at the time of release, featuring a 1 million token context window and incorporating the frontier coding capabilities previously exclusive to the GPT-5.3-Codex line. The model achieves 57.7% on SWE-Bench Pro.