Windsurf: GPT-5.6 Now Available in Devin
WindsurfWindsurf (Devin) added support for OpenAI's new GPT-5.6 three-tier model family: Sol (flagship), Terra (balanced, roughly half the cost of GPT-5.5), and Luna (cheapest and fastest). The models are available across Devin Desktop, Devin CLI, and a Devin Cloud preview through July 16, 2026. On Cognition's FrontierCode 1.1 benchmark, Sol scored 64.9% at nearly half the cost of the next-best model, framing the addition primarily as a cost-efficiency and model-choice upgrade.
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GPT-5.6 Lands in Windsurf's Devin
On July 9, 2026, Windsurf added OpenAI's newly released GPT-5.6 model family to Devin, giving developers access to the three-tier lineup across Devin Desktop, the Devin CLI, and a time-limited Devin Cloud preview running through July 16, 2026.
Three Tiers to Choose From
GPT-5.6 arrives in three variants tuned to different cost and capability needs:
- Sol is the flagship, built for the heaviest reasoning and coding workloads.
- Terra is the balanced mid-tier option, priced at roughly half the cost of the previous GPT-5.5 generation, making it an attractive default for everyday agentic work.
- Luna is the cheapest and fastest of the three, aimed at lightweight or high-volume tasks.
Benchmark and Cost Positioning
Cognition positions the launch around efficiency rather than raw capability alone. On its FrontierCode 1.1 benchmark, Sol scored 64.9% while costing nearly half as much as the next-best-performing model, reinforcing the message that GPT-5.6 delivers strong coding performance at a materially lower price. For teams running Devin at scale, the Terra tier in particular is framed as a way to cut per-task cost without giving up much quality.
Availability
GPT-5.6 is selectable now in Devin Desktop and the Devin CLI, with the Devin Cloud preview available through July 16, 2026. Community reception has been mixed, with some noting OpenAI's own safety card flags reliability caveats, but the cost-efficiency story has driven most of the early interest among Devin users.