Claude Code vs Codex (2026): Cost and Capability
Codex leads Claude Code 83.4% to 78.9% on Terminal-Bench 2.1, but the prices match and the cheaper agent flips with your harness. The honest scorecard.
Capability under pressure
Models & benchmarks
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Continue the descent.
Model releases, capability comparisons and rigorous analysis of the benchmarks used to rank them.
The Price Reversal Phenomenon: When Cheaper AI Costs More
A 2026 Microsoft Research preprint found the cheaper-per-token AI model cost more to finish the job in 32% of model pairs. Why the sticker misleads.
GPT-5.6 Pricing: What to Expect Per Task
GPT-5.6 launched June 26 2026 as Sol, Terra and Luna. The flagship Sol holds GPT-5.5 pricing at $5/$30 per million tokens. Here is the real cost per task.
Open-Source LLMs Overtook Proprietary in 2026
Token data from OpenRouter shows open-source LLMs passing proprietary models in mid-2026, a roughly 60/40 flip. The daily breakdown by AI lab.
Why Local LLMs Got Good in 2026: Capability & Cost
Open-weights LLMs crossed from toy to useful in 2026. What actually changed, and the cost math for when running a model yourself beats paying an API.
AI Agent Benchmarks in 2026: What the Scores Actually Mean
AI agent benchmarks broke in 2026: reward-hacked to 100%, SWE-bench Verified retired, scores swung by harness choice. What each measures and which to trust.