ColinBuilds.com · Official Anthropic API pricing
Claude Sonnet 5
- Input / 1M
- $2.00
- Output / 1M
- $10.00
- Official Anthropic context window
- 1,000,000 tokens
Anthropic Claude API claude-sonnet-5 official API pricing. Introductory pricing through 2026-08-31 is $2 input and $10 output per 1M tokens. Standard pricing starting 2026-09-01 is $3 input and $15 output per 1M tokens. · as of July 7, 2026
Compare models
Same per-1M input/output rates as above. Enter your monthly token volumes to compare bills.
Claude Sonnet 5
- Input: 1M × $2.00 = $2.00
- Output: 1M × $10.00 = $10.00
- Total
- $12.00
GPT-4o
- Input: 1M × $2.50 = $2.50
- Output: 1M × $10.00 = $10.00
- Total
- $12.50
Difference
$0.50
GPT-4o costs $0.50 more than Claude Sonnet 5.
Popular comparisons
30 total featuring Claude Sonnet 5.
Claude Sonnet 5 is Anthropic’s current Sonnet-tier API model, built for builders who want a strong mix of speed, intelligence, long-context work, and practical everyday coding or writing help without paying for the higher Opus or Fable tiers.
What this model is
Anthropic lists the exact Claude API ID and alias as claude-sonnet-5. The models overview describes Claude Sonnet 5 as offering the best combination of speed and intelligence in the current Claude lineup.
The same overview lists Claude Sonnet 5 with text and image input, text output, multilingual capability, vision support, adaptive thinking, a 1 million token context window, and a 128,000 token maximum output. Anthropic notes that every Claude model ID is a pinned snapshot; claude-sonnet-5 is not an evergreen pointer to an unspecified future model.
Pricing notes
Anthropic’s official pricing page lists Claude Sonnet 5 introductory API pricing through August 31, 2026 at $2 per 1M input tokens and $10 per 1M output tokens. The calculator on this page uses those introductory rates.
The same official pricing page states that standard Claude Sonnet 5 pricing starts September 1, 2026 at $3 per 1M input tokens and $15 per 1M output tokens. Anthropic also lists separate prompt-cache prices: during the introductory period, 5-minute cache writes are $2.50 per 1M tokens, 1-hour cache writes are $4 per 1M tokens, and cache hits and refreshes are $0.20 per 1M tokens. Starting September 1, 2026, those cache figures become $3.75, $6, and $0.30 per 1M tokens.
These figures are first-party Claude API prices. Anthropic’s page also separates Batch API discounts, partner cloud pricing, data residency, and regional endpoint premiums, so production estimates should check the exact route being used.
Benchmarks and specs
Anthropic’s models overview lists Claude Sonnet 5 with a 1 million token context window, a 128,000 token maximum output, a reliable knowledge cutoff of January 2026, and a training data cutoff of January 2026.
This page does not show a parameter count or public benchmark score. Those numbers should only be shown when exact public sources are matched to claude-sonnet-5 specifically.
Best fit
Claude Sonnet 5 is best for builders who want one strong default Claude API model for coding help, drafting, research, long-document analysis, structured assistant workflows, and agent-style tasks where both cost and quality matter.
It is also useful as a pricing comparison point because the temporary introductory rate is lower than the standard Sonnet price that Anthropic says takes effect from September 1, 2026.