Claude Opus 5
For complex agentic coding and enterprise work
Claude Opus 5 is Anthropic's July 2026 Opus-tier model release for complex agentic coding, enterprise knowledge work, deep reasoning, long-context tasks, and vision-capable workflows.
Pricing
5-minute cache writes: $6.25/MTok; 1-hour cache writes: $10/MTok; cache hits & refreshes: $0.50/MTok. MTok = million tokens.
Anthropic's official Claude Platform pricing page lists Claude Opus 5 at $5 per million base input tokens and $25 per million output tokens, with cache hits/refreshes at $0.50 per million tokens. The page states all prices are in USD.
Model Intelligence
Recent stories
Claude Code users reported Fable 5 and Opus 5 sessions exhausting five-hour usage windows in about 6–10 minutes after automated tool calls. The reports tie the failures to agent loops and rate-limit economics, including one Reddit claim of 10.26M tokens, 15 calls, and no edits.
Agent Arena says Claude Opus 5 Max placed second and Opus 5 High placed third across more than 7,000 real agentic sessions. Practitioner reports remain mixed across harnesses and prompting styles.
Claude Opus 5 combined benchmark wins with coding-agent reliability complaints. It led ProgramBench and Arena frontend rankings, while users reported overbuilding, missed intent, and switches back to Fable.
New benchmark posts put Claude Opus 5 first on LLM Debate, a short-story test, Extended NYT Connections, and DeepSWE. Developers also reported over-editing and long-session failures, making private evals a recurring caveat.
Anthropic released Claude Opus 5 with Fast Mode on paid plans and the API at the Opus 4.8 price. Benchmarks from ARC Prize, Artificial Analysis, Vals AI, and tool vendors put it near or ahead of Fable 5 on several agent and coding tests.