Tutorials, deep dives and product notes — built for developers.
GPT-6.1 Sol replaced GPT-6 Sol after seven days: +4 index points, +12 on Terminal-Bench 4.0, and a cache rate halved to $0.10. It also dropped the "none" reasoning setting, uses 10-30% more output tokens, and is measurably slower.
Across all six effort levels, GPT-6 Sol scores within a point of GPT-5.6 Sol and costs about half as much per task. Same-harness data on both, the full effort ladder, where coding improved, where knowledge work regressed, and the November price cliff.
OpenAI shipped GPT-6 Sol 90 minutes after Claude Opus 5.5, at half the token price. Artificial Analysis ran both on the same tests: Sol is cheaper to any index score up to about 44, then runs out of headroom. Every benchmark, both effort ladders and the real bill.
Terminal-Bench 4.0: the tbench.ai public board remains led by Claude Opus 5.5 (64.8%). Adds Kimi K3.1 Pro (65.7%, Moonshot), Gemini 4 Carbon (64%, Artificial Analysis), GPT-6.1 Terra (50.3%) and MiniMax M3.1 Flash (38.1%) as separately labeled runs. Updated Oct 30, 2026.
Archived FrontierCode 1.1 Main leaderboard: Cognition results remain separate from independent Artificial Analysis runs; adds Kimi K3.1 Pro’s 47.1% AA Stirrup result. FrontierCode 2.0 is current and not score-comparable. Updated Oct 30, 2026.
DeepSWE v1.1: adds Kimi K3.1 Pro (75.5%) and MiniMax M3.1 Flash (73.7%) as provider/model-card runs, separate from Datacurve's mini-swe-agent board. Muse Wonder Full (79.0%) remains the top provider score. Updated Oct 30, 2026.