claude opus 4.6 Blog
Claude Opus 4.7 vs Claude Opus 4.6: Improvement and Migration Guide
Claude Opus 4.7 (released April 16, 2026) delivers a measurable upgrade over Opus 4.6 with +13% resolution on a 93-task coding benchmark, CursorBench jumping from 58% to 70%, SWE-bench Pro rising from 53.4% to 64.3%, 3.3× higher-resolution vision (up to 3.75 MP), a new `xhigh` effort level, self-verification loops, and identical $5/$25 per-million-token pricing. Low-effort 4.7 often matches medium-effort 4.6 quality, reducing effective cost per task. It trails only the limited-release Mythos Preview.
Composer 2: What is new and Compares with Claude Opus 4.6 & GPT-5.4
Composer 2 is a next-generation AI coding model developed by Cursor, designed specifically for software engineering tasks. It delivers frontier-level coding performance at up to 10× lower cost than competitors like Claude Opus 4.6 and significantly cheaper than GPT-5.4, thanks to a code-only training approach, reinforcement learning optimization, and efficient model architecture.
Claude Opus 4.6 vs GPT-5.3 Codex: Which is Better for Developers
Both launches (Anthropic’s Claude Opus 4.6 and OpenAI’s GPT-5.3-Codex) advance agentic coding and long-context reasoning, but they pull in slightly different directions. Opus 4.6 leans into very large context windows, safety/analysis workflows, and a new “fast” mode; GPT-5.3-Codex doubles down on agentic software engineering benchmarks and tighter IDE/CLI integrations. The “better” model depends on what you need: huge-context, safety-first code review and long-running agents (Opus 4.6) — or marginally stronger raw coding benchmark performance, speed and immediate Codex integrations (GPT-5.3-Codex). See the deep dive below.
Is the Claude Opus 4.6 worth it?
Anthropic’s Claude Opus 4.6 arrived in February 2026 as a clear, purpose-built push toward enterprise-grade agents, long-context knowledge work, and stronger autonomous coding. The release mixes ambitious engineering (a beta one-million-token context mode, an “adaptive thinking” capability, and agent teamwork features) with a pragmatic commercial decision: Anthropic kept API pricing consistent with its previous Opus family models. That combination — materially improved capabilities without an immediate price jump — is the headline.
Claude Opus 4.6 is now available in CometAPI
Starting today, you can use Anthropic's latest SoTA model, Claude Opus 4.6 API is now available in CometAPI . Claude Opus 4.6 is Anthropic’s newest “Opus”-class large language model, it is positioned as a workhorse for knowledge-work and research workflows