Models/Anthropic/Claude Sonnet 5.5

Claude Sonnet 5.5

Name: Claude Sonnet 5.5 API access
Brand: Anthropic

NEW

Anthropic · Proprietary · Released Sep 28, 2026 · anthropic/claude-sonnet-5.5

Best $2.00 in / $10.00 out via Anthropic

Compare Estimate cost

1M contextVisionToolsReasoningStructured outputPrompt caching

Available from 8 providersUSD / MTOK · PRICES 23 MINUTES AGO · SPEED 2 MINUTES AGO

EST. MONTHLY COSTclick a row for detail · click headers to sort

PROVIDER	INPUT	OUTPUT	CACHE	CONTEXT	QUANT	TTFT	TPS	UPTIME
Anthropic1ST PARTY	$2.00	$10.00	$0.20	1M	—	—	—	100.0%
Amazon Bedrock	$2.00	$10.00	$0.20	1M	—	—	—	100.0%
Azureazure/global	$2.00	$10.00	$0.20	1M	—	—	—	99.8%
Googlegoogle-vertex/global	$2.00	$10.00	$0.20	1M	—	1.2s	206 tok/s	100.0%
Claude Platform on AWS	$2.00	$10.00	$0.20	1M	—	—	—	100.0%
Azureazure/us	$2.20	$11.00	$0.22	1M	—	—	—	—
Googlegoogle-vertex/us	$2.20	$11.00	$0.22	1M	—	—	—	99.9%
Googlegoogle-vertex/europe	$2.20	$11.00	$0.22	1M	—	—	—	100.0%

TTFT/TPS: median (P50) over trailing 504h · chat10k profile (~10K in / 200 out) · measured via OpenRouter routing · methodology v1.1 · measured 2 minutes ago

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Pricing variants · USD / MTok in / out

STANDARD

$2.00 / $10.00

per MTok in / out

BATCH

$1.00 / $5.00

async batch

CACHE READ $0.20CACHE WRITE $2.50WEB SEARCH $0.01 / searchCACHE WRITE 1H $4.00 / MTok

Recent changesRSS ↗

Sep 29, 2026model added

About

Claude Sonnet 5.5 is Anthropic's Sonnet-class model for well-scoped everyday work, succeeding Claude Sonnet 5 as a direct upgrade. It is especially strong at building features, fixing bugs, and producing...

Specifications

Context window1,000,000

Max output128,000

Modalities intext, image, file

Modalities outtext

LicenseProprietary

ReleasedSep 28, 2026

TokenizerClaude

Claude Opus 5.5$4.00 / $20.00 Claude Fable 5.1$10.00 / $50.00 Claude Opus 5$5.00 / $25.00 Claude Sonnet 5$2.00 / $10.00

Compare with

Claude Sonnet 5.5 vs Claude Opus 5.5

Embed badge

[![Claude Sonnet 5.5](https://modelindex.ai/badge/anthropic/claude-sonnet-5.5)](https://modelindex.ai/models/anthropic/claude-sonnet-5.5)

Sources

OpenRouter API23 minutes ago

AGGREGATOR

ModelIndex benchmarks2 minutes ago

MEASURED

Verified 23 minutes ago · list prices, not negotiated rates.