Terminal-Bench 4.0 Cost Math: GPT-6.1 Sol Matches Opus 5.5 at ~1/8 the Price
LeadershipNo2904 · reddit · 2026-11-13
Using official Terminal-Bench 4.0 results, the author compares cost per successful coding task: Claude Opus 5.5 hits 65.8% success at $4,700 benchmark execution cost, GPT-6 Astra 60.3% at $3,300, and GPT-6.1 Sol 60.9% at $600—roughly 7.8x cheaper than Opus 5.5 with near-equal success. On subscriptions, Claude Max ($100) offers 5x Pro usage and Ultra ($200) 10x, while OpenAI's Codex multipliers are undisclosed. Takeaway: benchmark intelligence and subscription value differ; cost per successful task matters as much as success rate.
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