Packaging change·Dec 29 → Mar 30, 2026·Q1 2026·AI & Machine Learning
Anthropic API Drops Tiered Pricing for Sonnet 4.6, Goes Flat Rate
What changed
Package change
Sonnet 4.6 drops the 200K-token tiered pricing used by Sonnet 4.5. Flat $3/$15 MTok replaces tiers of $3/$6 input and $15/$22.50 output. Extended caching tiers ($7.50/$0.60) also removed.
Before and after
Dec 29, 2025 vs Mar 30, 2026Pulse.
100%
What changed
Sonnet 4.6 drops the 200K-token tiered pricing used by Sonnet 4.5. Flat $3/$15 MTok replaces tiers of $3/$6 input and $15/$22.50 output. Extended caching tiers ($7.50/$0.60) also removed.
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Week 12, 2026 · Anthropic API simplifies pricing, removes volume-based tiersAnthropic API launches Managed Agents at $0.08 per session-hour of runtime · Week 17, 2026
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