lmprices

AnthropicClaude Sonnet 4.5 API pricing

Claude Sonnet 4.5 costs $3.00 per 1M input tokens and $15.00 per 1M output tokens on Anthropic's API, since .

Current price

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

Input
$3.00
Output
$15.00
Blended 3:1
$6.00
Claude Sonnet 4.5 current rates per 1M tokens
RatePer 1M tokens
Standard
Input$3.00
Cached input$0.30
Cache write (5 min)$3.75
Cache write (1 hour)$6.00
Output$15.00
Batch
Input$1.50
Output$7.50

Launch price

Claude Sonnet 4.5 launched at this price on .

Input
$3.00
Output
$15.00
Blended 3:1
$6.00

Price history

InputOutput
$0$5$10$15Oct 2025Jan 2026Apr 2026Jul 2026Oct 2026 Input $3.00, from September 29, 2025Output $15.00, from September 29, 2025Output $15.00Input $3.00 $0$5$10$15Jan 2026Jul 2026 Input $3.00, from September 29, 2025Output $15.00, from September 29, 2025Output $15.00Input $3.00
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 ·

    • Input, >200K tokens: separate tier ended (was $6.00)
    • Output, >200K tokens: separate tier ended (was $22.50)
    • Cached input, >200K tokens: separate tier ended (was $0.60)
    • Cache write (5 min), >200K tokens: separate tier ended (was $7.50)
    • Cache write (1 hour), >200K tokens: separate tier ended (was $12.00)
    • Batch input, >200K tokens: separate tier ended (was $3.00)
    • Batch output, >200K tokens: separate tier ended (was $11.25)
    Rates from April 30, 2026
    RatePer 1M tokens
    Standard
    Input$3.00
    Cached input$0.30
    Cache write (5 min)$3.75
    Cache write (1 hour)$6.00
    Output$15.00
    Batch
    Input$1.50
    Output$7.50

    The above-200K long-context tier ended when the 1M beta was retired on 2026-04-30 (listed under that date in the release notes; announced 2026-03-30). Prompts are capped at 200K, so one flat rate card applies. The pricing page had already dropped the Sonnet 4.5 long-context row between the 2026-03-16 and 2026-04-07 captures.

  2. Launch price ·

    Rates from September 29, 2025
    Rate≤200K tokens>200K tokens
    Standard
    Input$3.00$6.00
    Cached input$0.30$0.60
    Cache write (5 min)$3.75$7.50
    Cache write (1 hour)$6.00$12.00
    Output$15.00$22.50
    Batch
    Input$1.50$3.00
    Output$7.50$11.25

    The above-200K rates applied only with the 1M-context beta enabled (usage tier 4 and custom rate limits). The pricing page lists only input and output prices above 200K tokens and says prompt caching multipliers and the Batch API discount apply on top of long context pricing; those above-200K cache and batch prices are not printed as numbers; they are derived from the multipliers the same page states for this model's long context tier (cache read 0.1x, 5-minute write 1.25x, 1-hour write 2x the long context input price; batch 50% of long context input and output).

Gaps in this history

Above-200K cache and batch prices before 2026-04-30 are derived from the multipliers the pricing page states, not printed as numbers.

API ids

Checked .