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Claude Haiku 5.5 vs GPT-6 Luna: identical $0.10/$0.50 list prices, but Haiku scores higher on Artificial Analysis (43 vs 38) while Luna costs about 3× less per task at max effort. Price cliffs at 100K and 272K, vendor and independent benchmarks, effort ladder, and a routing guide.
GPT-6 Luna vs GPT-5.4 Mini compared: rate card, context windows, knowledge cutoffs, and the shared Artificial Analysis harness where Luna leads the Intelligence Index 37 to 24 at 6.4x lower cost per task, while mini wins on speed. Vendor scorecard gaps stated honestly.
OpenAI's cheapest tier cut its price 61%, cut its hallucination rate from 93% to 77%, and lost a point on the independent index. Same-harness data on both generations, where Luna regressed, where it improved, and the ten-week price collapse.
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.