Anthropic has released Claude Opus 4.8, a minor update to its Opus model, focusing on improved performance and flexibility. The release, which occurred on May 28, 2026, introduces a fast-throughput mode that can increase processing speed up to 2.5 times, though at a doubled cost. Additionally, Opus 4.8 now supports mid-session system messages, a lower prompt-cache floor, and documented refusal stop details. Developers will need to update their model ID to 'claude-opus-4-8' and remove any usage of 'budget_tokens', which is no longer supported. AI
IMPACT This update offers increased speed and flexibility for developers, potentially lowering latency and improving user experience in applications utilizing Anthropic's models.
RANK_REASON New model release from a frontier lab (Anthropic). [lever_c_demoted from frontier_release: ic=1 ai=1.0]
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- Amazon Bedrock
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- Claude Opus 4.7
- Claude Opus 4.8
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