lmprices

AnthropicClaude Sonnet 5.5 API pricing

Claude Sonnet 5.5 costs $2.00 per 1M input tokens and $10.00 per 1M output tokens on Anthropic's API, since .

Current price

Rates in effect since (price change). Every price links to its source.

Input
$2.00
Output
$10.00
Blended 3:1
$4.00
Claude Sonnet 5.5 current rates per 1M tokens
RatePer 1M tokens
Standard
Input$2.00
Cached input$0.10
Cache write (5 min)$2.50
Cache write (1 hour)$4.00
Output$10.00
Batch
Input$1.00
Output$5.00

Launch price

Claude Sonnet 5.5 launched at this price on .

Input
$2.00
Output
$10.00
Blended 3:1
$4.00

Price history

InputOutput
$0$2.50$5$7.50$10Oct 2026 Input $2.00, from September 28, 2026Output $10.00, from September 28, 2026Output $10.00Input $2.00 $0$2.50$5$7.50$10Oct 2026 Input $2.00, from September 28, 2026Output $10.00, from September 28, 2026Output $10.00Input $2.00
Headline standard prices per 1M tokens. A filled circle marks a dated change; an open circle, a change first seen between two captures.

Every price event

2 verified events, newest first. 1 price move. Documented since .

  1. Price change ·

    Rates from October 7, 2026
    RatePer 1M tokens
    Standard
    Input$2.00
    Cached input$0.10
    Cache write (5 min)$2.50
    Cache write (1 hour)$4.00
    Output$10.00
    Batch
    Input$1.00
    Output$5.00

    Listed under 2026-10-07 in the release notes and announced in the Haiku 5.5 launch post. The 2026-10-07 21:15 UTC capture still showed $0.20 in the table and the 2026-10-08 04:32 UTC capture shows $0.10.

  2. Launch price ·

    Rates from September 28, 2026
    RatePer 1M tokens
    Standard
    Input$2.00
    Cached input$0.20
    Cache write (5 min)$2.50
    Cache write (1 hour)$4.00
    Output$10.00
    Batch
    Input$1.00
    Output$5.00

    Columns in the redesigned docs table: Input | Output | 5m writes | 1h writes | Hits and refreshes.

Gaps in this history

None for standard pricing.

API ids

Checked .