Sonnet 5’s $3 / $15 Price Move Was Reversed — Still $2 / $10 (October 2026)

Correction — October 2, 2026: Anthropic reversed course. Sonnet 5 did not move to $3 / $15 on September 1 — it remains $2 / $10 on the first-party API table (batch $1 / $5), and Sonnet 5.5 is the current Sonnet at the same $2 / $10. The September 17 operator note below is preserved as the record of what the card showed then.

Last refreshed: October 5, 2026 (Pacific)

Operator note. Verified September 17, 2026 against platform.claude.com/docs/en/about-claude/pricing.

Sonnet 5 is no longer $2 / $10 on the first-party API table. Anthropic published introductory pricing through August 31, 2026, then the standard rate: $3 per million input tokens and $15 per million output tokens starting September 1, 2026.

That is a 50% unit-price move on input and output versus the intro card. Sonnet 4.6 was already $3 / $15. The two mid-tier SKUs now share the same list. Cache writes follow the new input rate ($3.75 / MTok for 5-minute writes; $0.30 / MTok cache reads). Batch stays 50% off that list.

What did not move on this check:

• Claude Pro $20/mo or $17/mo annual ($200 prepaid)
• Max 5x $100/mo, Max 20x $200/mo
• Team Standard $25 monthly / $20 annual; Premium $125 / $100
• Haiku 4.5 $1 / $5; Opus 5.5 $4 / $20; Fable 5.1 $10 / $50

Lineup currency (Oct 2026): Current API list (Oct 2026, verified): Sonnet 5.5 $2/$10, Opus 5.5 $4/$20, Haiku 4.5 $1/$5, Fable 5.1 $10/$50. Legacy (still listed on Anthropic’s card): Opus 4.8 $5/$25, Sonnet 4.6 $3/$15.

• Cursor Hobby free, Pro $20, Pro+ $60, Ultra $200, Teams $40/user

If a workflow was budgeted during the September scare, the meter is back to $2 / $10 — the same as Sonnet 5.5. Haiku 4.5 is still the cheap public list. Live desks: API rates, seats.