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Claude Opus 4.8 released May 28, 2026: Dynamic Workflows, 4x honesty, 35% fewer tokens, $15/$75 pricing. Full review covering benchmarks, features, and develope
Flask creator Armin Ronacher found that Anthropic's newest models, Opus 4.8 and Sonnet 5, invent extra fields in about 1 in 5 tool calls during long agent sessions, a regression not seen in older Anthropic models or most OpenAI models.
v2.1.156 patches thinking block corruption on Opus 4.8 that caused 400 API errors in multi-turn sessions. Learn what broke, how to update, a
Claude Opus 4.8 is live. Fast mode adds 2.5× throughput. Old budget_tokens syntax returns 400. Full API runbook with code examples and migra
Opus 4.8 and GPT-5.5 investigate the same anonymous signup failure. Zero human nudges versus three, and a root cause one character wide. Summary post with the full interactive side-by-side linked.
Anthropic shipped Opus 4.8 with higher coding scores and frozen pricing — but as someone running Claude Code all day, the 2.5x faster, 3x cheaper fast mode was what actually landed.
Anthropic has officially released Claude Opus 4.8 , its most capable generally available AI model...
A few days with Opus 4.8 in Claude Code. The benchmarks went up, but the default 1M context window is what actually changed my long sessions.