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Claude Opus 4.8

Model family: Claude
Claude Opus 4.8, released May 28, 2026, is an upgrade to Opus 4.7 and Anthropic's most capable publicly available model. The headline improvement is reliability: it is roughly four times less likely to let coding errors pass unremarked and more likely to flag uncertainties about its work and less likely to make unsupported claims. On coding it sets a new bar, with a record 69.2 percent on SWE-Bench Pro versus Opus 4.7's 64.3 percent
New Multimodal Gen 3
Released: May 28, 2026

Overview

Claude Opus 4.8 is Anthropic's new flagship model, released May 28, 2026. It improves on Opus 4.7 with stronger coding, more honest self-assessment, and a faster, cheaper fast mode, at the same standard pricing. New features include user-controlled effort levels and Dynamic Workflows for parallel subagents.

About Anthropic

Anthropic is a technology company specializing in artificial intelligence and machine learning solutions.

Industry: Artificial Intelligence
Company Size: 3673
Location: San Francisco, California, US
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Tools using Claude Opus 4.8

  • Claude
    Building reliable, interpretable AI systems
    Open
    Claude — v4.8
    Claude Opus 4.8 Best in class coding: record 69.2% on SWE-Bench Pro, up from 4.7's 64.3% New fast mode: ~2.5x speed, about 3x cheaper User-controlled effort levels (high default, plus "extra"/"max") Dynamic Workflows (research preview): spins up hundreds of parallel subagents in a single session More honest: roughly four times less likely to let coding errors pass unremarked
Last updated: May 28, 2026
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