Claude Opus 4.8 Fast Mode: 2.5x Faster Output in Python
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Kodetra Technologies··9 min read Intermediate Summary
Use speed:"fast" on Claude Opus 4.8 for up to 2.5x faster output, with a safe rate-limit fallback.
Claude Opus 4.8 Fast Mode: 2.5x Faster Output in Python
Anthropic shipped Claude Opus 4.8 on May 28, 2026, and a few days later quietly turned on something a lot of agent builders had been waiting for: fast mode for the 4.8 tier. Set one field, speed: "fast", and you get up to 2.5x higher output tokens per second from the exact same model weights. No quality trade-off, no distilled mini-model, just faster generation.
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