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Tools2026-09-23 · source-backed
python/v1.57.0 and typescript/v1.19.0 on September 22 also add an mcp_router tool, a handoff_to_user tool, and snapshot session management for Graph and Swarm. An existing Strands agent without a pinned model switches to Opus after upgrading, which changes your cost per run without you doing anything.
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Anthropic released Claude Fable 5.1 on September 1. Claude Code v2.1.257 made it the default Fable model at 17:53 UTC that day, with a 1M-token context window, $10 per million input tokens, $50 per million output, and $0.25 per million on cache reads (claude-code CHANGELOG). B...
Tessl ran 880 evaluations across 9 models with and without agent skills. The result inverts what most teams assume about AI costs. Haiku 4.5, Anthropic's cheapest model at roughly $0.25 per million tokens, scored 84.3% when given a well-crafted agent skill. Opus 4.7, the most...
DeepClaude hit 470 points on Hacker News. It swaps Claude Code's API backend to DeepSeek V4 Pro while preserving the full agent loop: file editing, bash execution, git tooling, the whole workflow. DeepSeek V4 Pro scores 96.4% on LiveCodeBench at a fraction of Anthropic's prici...
I've been saying for months that the real gains aren't in switching models. They're in how you set up the environment around the model. Now there's quantitative proof. Stanford IRIS Lab published Meta-Harness, a system that autonomously evolves its own coding harness, system p...
This is the install-this-today story. code-review-graph (3.5K GitHub stars) builds a persistent AST-based knowledge graph of your codebase using Tree-sitter, then queries it at review time to compute the minimal context set Claude actually needs. On a 27,732-file Next.js monor...
The trick is one line in a file you never read. Manifold Security published eight findings across seven coding agents (Claude Code, Codex, Cursor, Grok Build, Qwen Code, goose, Hermes Agent) that all reduce to the same mechanism. A repository's own .git/config sets core.fsmoni...
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