Anthropic price history
Every pricing change we record for Anthropic API models, newest first. Tracking began Oct 6, 2025. Prices re-verified Sep 29, 2026.
What changed
8 recorded changes · newest first · every move keeps its receipt-
Sep 29, 2026
New model added: Claude Sonnet 5.5 new listing
Claude Sonnet 5.5 began being tracked.
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Sep 23, 2026
New model added: Claude Opus 5.5 new listing
Claude Opus 5.5 began being tracked.
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Sep 5, 2026
New model added: Claude Opus 4 new listing
Claude Opus 4 began being tracked.
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Sep 5, 2026
New model added: Claude Sonnet 4 new listing
Claude Sonnet 4 began being tracked.
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Sep 1, 2026
New model added: Claude Fable 5.1 new listing
Claude Fable 5.1 began being tracked.
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Sep 1, 2026
New model added: Claude Mythos 5.1 new listing
Claude Mythos 5.1 began being tracked.
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Jul 25, 2026
New model added: Claude Opus 5 new listing
Claude Opus 5 began being tracked.
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Jun 30, 2026
New model added: Claude Sonnet 5 new listing
Claude Sonnet 5 began being tracked.
Current Anthropic prices
15 models · cheapest blended firstPer 1M tokens, cheapest blended first. "First tracked" is when this model entered our price history.
| Model | Blended* | Input | Output | First tracked |
|---|---|---|---|---|
| Claude Haiku 4.5 | $2.00 | $1.00 | $5.00 | Oct 20, 2025 |
| Claude Sonnet 5 | $4.00 | $2.00 | $10.00 | Jun 30, 2026 |
| Claude Sonnet 5.5 | $4.00 | $2.00 | $10.00 | Sep 29, 2026 |
| Claude Sonnet 4.5 | $6.00 | $3.00 | $15.00 | Oct 6, 2025 |
| Claude Sonnet 4.6 | $6.00 | $3.00 | $15.00 | Feb 23, 2026 |
| Claude Opus 5.5 | $8.00 | $4.00 | $20.00 | Sep 23, 2026 |
| Claude Opus 4.5 | $10.00 | $5.00 | $25.00 | Dec 8, 2025 |
| Claude Opus 4.6 | $10.00 | $5.00 | $25.00 | Feb 9, 2026 |
| Claude Opus 4.7 | $10.00 | $5.00 | $25.00 | Apr 20, 2026 |
| Claude Opus 4.8 | $10.00 | $5.00 | $25.00 | Jun 1, 2026 |
| Claude Opus 5 | $10.00 | $5.00 | $25.00 | Jul 25, 2026 |
| Claude Fable 5 | $20.00 | $10.00 | $50.00 | Jun 17, 2026 |
| Claude Fable 5.1 | $20.00 | $10.00 | $50.00 | Sep 1, 2026 |
| Claude Mythos 5 | $20.00 | $10.00 | $50.00 | Jun 27, 2026 |
| Claude Mythos 5.1 | $20.00 | $10.00 | $50.00 | Sep 1, 2026 |
About this log
ModelPriceWatch re-verifies Anthropic API pricing against its official pricing page on a twice-daily refresh cycle and records every change here.
Quick stats
- Models tracked
- 15
- Recorded changes
- 8
- Tracking since
- Oct 6, 2025
- Last change
- Sep 29, 2026