Claude Sonnet 5.5
anthropic The API that serves this model and sets the prices shown here. claude-sonnet-5-5 The model identifier to send in API requests. LLM Generates text from a prompt, so it can be compared with other LLMs on price and capability. Medium The balanced tier of a model family, trading some capability for speed and cost.Provider: Anthropic
Knowledge cutoff: June 2026
Nothing to act on today. The cost is the checking: someone has to remember to look again next month, and the month after. Coolhand watches this model for you and automatically updates your agents to the most compatible replacement the moment a retirement is announced — one less thing on your list, permanently.
Sticker prices & cost-per-token
List rates as published by Anthropic, before any volume or enterprise discounts.
$2.00
$10.00
1,000,000 tokens
128,000
tokens per response (includes reasoning tokens)
$0.10
$2.50
$2.50
Get this data free
Want to stay updated on price changes on this model? Pull this data free (no API key required) here:
curl "https://coolhandlabs.com/api/v2/inference_apis?q%5Bmodel_eq%5D=claude-sonnet-5-5&q%5Bsource_api_eq%5D=anthropic"Pricing History
| Effective | Price |
|---|---|
| Oct 12, 2026 – present | Input cost: $2.00 / 1M, Output cost: $10.00 / 1M, Cached input cost: $0.10 / 1M, Cache creation cost: $2.50 / 1M, 5-minute cache write cost: $2.50 / 1M, 1-hour cache write cost: $0.00 / 1M, Reasoning output cost: $0.00 / 1M, Cache storage cost: $0.00 / 1M/hr |
| Oct 5, 2026 – Oct 12, 2026 | Input cost: $2.00 / 1M, Output cost: $10.00 / 1M, Cached input cost: $0.20 / 1M, Cache creation cost: $0.00 / 1M, 5-minute cache write cost: $2.50 / 1M, 1-hour cache write cost: $0.00 / 1M, Reasoning output cost: $0.00 / 1M, Cache storage cost: $0.00 / 1M/hr |
History
Last change detected October 12, 2026 (13 days ago) by an automated scan.
| Date | Changed by | What changed |
|---|---|---|
| Oct 5, 2026 | Automated scan | Initial record created |
Source
https://www.anthropic.com/pricingComparable models
No comparable models identified yet.
Reliability
No reliability incidents recorded in the last 90 days.
Frequently asked questions
Claude Sonnet 5.5 (Anthropic) costs $2.00 per 1M input tokens and $10.00 per 1M output tokens, as last published by Anthropic.
Claude Sonnet 5.5 has a context window of 1,000,000 tokens (the maximum combined input and output it can handle in a single request).
Claude Sonnet 5.5 sits in the medium size tier. Size tiers run from micro (small enough to run on a device) through small, medium and large to extra large (frontier flagships), and are assigned from the model's family, naming and limits rather than its price.
Claude Sonnet 5.5 can generate up to 128,000 tokens in a single response. Reasoning (thinking) tokens count toward this limit.
Claude Sonnet 5.5's training data runs through June 2026, so it may not know about later events. Coolhand records the cutoff at month precision, since providers often publish only the month.
Claude Sonnet 5.5 accepts image and text as input and produces text as output, as recorded in the Coolhand catalog.
No, Claude Sonnet 5.5 is currently active with no announced deprecation date.
Call GET https://coolhandlabs.com/api/v2/inference_apis?q[source_api_eq]=anthropic&q[model_eq]=claude-sonnet-5-5 — free, no API key required, and scoped to just this model since source_api and model together are unique. See https://coolhandlabs.com/docs for the full REST API reference.
Coolhand also tracks Claude Opus 4, Claude Sonnet 4, Claude Opus 4.1, Claude Fable 5, Claude Haiku 4.5, and Claude Opus 4.5 from Anthropic. Some may already be deprecated, so check each model's status alongside its current pricing.
| Model | Input cost | Output cost | Context window | Max output tokens | Status |
|---|---|---|---|---|---|
| Claude Opus 4 | $15.00/1M $0.0000150000 | $75.00/1M $0.0000750000 | — | — |
Deprecated Jul 13, 2026
|
| Claude Sonnet 4 | $3.00/1M $0.0000030000 | $15.00/1M $0.0000150000 | — | — |
Deprecated Jul 13, 2026
|
| Claude Opus 4.1 | $15.00/1M $0.0000150000 | $75.00/1M $0.0000750000 | — | — |
Deprecated Jul 13, 2026
|
| Claude Fable 5 | $10.00/1M $0.0000100000 | $50.00/1M $0.0000500000 | 1,000,000 | 128,000 | Active |
| Claude Haiku 4.5 | $1.00/1M $0.0000010000 | $5.00/1M $0.0000050000 | 200,000 | 64,000 | Active |
| Claude Opus 4.5 | $5.00/1M $0.0000050000 | $25.00/1M $0.0000250000 | 200,000 | 64,000 | Active |
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