Breaking

Cognition Adds GPT-6 Sol and GPT-6 Luna to Devin as Coding Costs Fall

September 22, 2026 at 14:49 EDT

Foundation Models
AI Agents
Software Dev & Coding

Cognition has made GPT-6 Sol and GPT-6 Luna available in Devin, adding two OpenAI models aimed at agentic software work and high-volume coding tasks. On Cognition's FrontierCode 1.1 Main leaderboard, GPT-6 Sol nearly matches GPT-5.6 Sol while cutting the average cost per rollout from $5.19 to $2.07, and GPT-6 Luna rises above GPT-5.6 Luna while listing at $0.10 per rollout.

Sep 22, 2026 · Cognition

GPT-6 hits Devin's cost curve

GPT-6 Sol and GPT-6 Luna are now available in Devin. The main story is lower task cost, with Sol near GPT-5.6 Sol's coding score and Luna becoming the cheapest model on the tracked leaderboard.

49.3%

GPT-6 Sol score

$2.07

Sol cost per rollout

42.4%

GPT-6 Luna score

$0.10

Luna cost per rollout

Cost per coding rollout

Vertical blocks show the relative drop from GPT-5.6 to GPT-6 in Devin's FrontierCode Main results.

$5.19GPT-5.6 Sol

$2.07GPT-6 Sol

$0.37GPT-5.6 Luna

$0.10GPT-6 Luna

Why developers like it

Cheaper rollouts can make repeated verification, routine edits and high-volume agent work easier to justify.

What stays limited

The scores are incremental, and GPT-6 Luna remains a low-cost option rather than a frontier performer.

The practical read

Sol lowers the bill for heavier Devin work. Luna pushes inexpensive, repeated coding-agent runs closer to mainstream use.

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