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Topic: "effort-control"
Claude Opus 4.5: 3rd new SOTA coding model in past week, 1/3 the price of Opus
claude-opus-4.5 gemini-3-pro gpt-5.1-codex-max opus-4.1 sonnet-4.5 anthropic amazon google anthropic coding agents tool-use token-efficiency benchmarking api model-pricing model-performance effort-control context-compaction programmatic-tool-calling alexalbert__ btibor91 scaling01 klieret
Anthropic launched Claude Opus 4.5, a new flagship model excelling in coding, agents, and tooling with a significant 3x price cut compared to Opus 4.1 and improved token efficiency using 76% fewer output tokens. Opus 4.5 achieved a new SOTA on SWE-bench Verified with 80.9% accuracy, surpassing previous models like Gemini 3 Pro and GPT-5.1-Codex-Max. The update includes advanced API features such as effort control, context compaction, and programmatic tool calling, improving tool accuracy and reducing token usage. Claude Code is now bundled with Claude Desktop, and new integrations like Claude for Chrome and Excel are rolling out. Benchmarks show Opus 4.5 breaking the 80% barrier on SWE-bench Verified and strong performance on ARC-AGI-2 and BrowseComp-Plus.