#reasoning

Research

Claude Sonnet 5.5 Launches: 70.6% on Terminal-Bench 4.0, $2/$10 Pricing, and GitHub Copilot Integration

Anthropic has officially released Claude Sonnet 5.5. The model scores 70.6% on Terminal-Bench 4.0 and 82.4% on SWE-bench Verified while maintaining the $2 per million input and $10 per million output token price point. Complete evaluation matrix, Sonnet 5.5 vs Opus 5.5 breakdown, AWS Bedrock configuration, and GitHub Copilot deployment details.

2026-09-28 18 min read

Research

Leaked Gemini 4 Pro Benchmarks Show Lead Over OpenAI and Anthropic Across DeepSWE, Terminal-Bench, and OSWorld

A leaked benchmark evaluation matrix pits Google DeepMind’s unreleased Gemini 4 Pro against Claude Opus 5.5 and GPT-6 Astra. The document reports scores of 88.7 on DeepSWE v1.1, 95.3 on Terminal-Bench 2.1, and 86.8 on OSWorld 2.0, alongside a 2-million-token context window and aggressive pricing of $2.25 input and $11.25 output per million tokens.

2026-09-28 16 min read

Research

GPT-6 Astra Deep Report: Recurrent Depth, FrontierMath Saturation, and OpenAI API Economics

A technical analysis of OpenAI’s GPT-6 Astra, released on September 4, 2026. Covers the 1,050,000-token context window, 97.6% FrontierMath score, 99.9% ARC-AGI-3 adapter result, recurrent depth reasoning, and complete developer API pricing.

2026-09-04 18 min read