Claude Opus 5.5
anthropic The API that serves this model and sets the prices shown here. claude-opus-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. Large The most capable general-purpose tier of a model family.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.
$4.00
$20.00
1,000,000 tokens
128,000
tokens per response (includes reasoning tokens)
$0.20
$5.00
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-opus-5-5&q%5Bsource_api_eq%5D=anthropic"Pricing History
| Effective | Price |
|---|---|
| Sep 28, 2026 – present | Input cost: $4.00 / 1M, Output cost: $20.00 / 1M, Cached input cost: $0.20 / 1M, Cache creation cost: $0.00 / 1M, 5-minute cache write cost: $5.00 / 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 September 28, 2026 (10 days ago) by an automated scan.
| Date | Changed by | What changed |
|---|---|---|
| Sep 28, 2026 | Automated scan | Initial record created |
Source
https://www.anthropic.com/pricingComparable models
| Claude Opus 5.5 This model | Claude Fable 5.1 newer, same tier | Claude Sonnet 5 cheaper alternative | |
|---|---|---|---|
| Provider | Anthropic | Anthropic | Anthropic |
| Input modalities | Image, Text | Image, Text | Image, Text |
| Output modalities | Text | Text | Text |
| Input cost | $4.00/1M $0.0000040000 | $10.00/1M $0.0000100000 | $2.00/1M $0.0000020000 |
| Output cost | $20.00/1M $0.0000200000 | $50.00/1M $0.0000500000 | $10.00/1M $0.0000100000 |
| Knowledge cutoff | June 2026 | June 2026 | January 2026 |
| Context window | 1,000,000 tokens | 1,000,000 tokens | 1,000,000 tokens |
| Max output tokens | 128,000 | 128,000 | 128,000 |
| Capabilities |
Tool calling
Structured output
Reasoning
Vision
Streaming
Prompt caching
|
Tool calling
Structured output
Reasoning
Vision
Streaming
Prompt caching
|
Tool calling
Structured output
Reasoning
Vision
Streaming
Prompt caching
|
| Status | Active | Active | Active |
Reliability
No reliability incidents recorded in the last 90 days.
Frequently asked questions
Claude Opus 5.5 (Anthropic) costs $4.00 per 1M input tokens and $20.00 per 1M output tokens, as last published by Anthropic.
Claude Opus 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 Opus 5.5 sits in the large 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 Opus 5.5 can generate up to 128,000 tokens in a single response. Reasoning (thinking) tokens count toward this limit.
Claude Opus 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 Opus 5.5 accepts image and text as input and produces text as output, as recorded in the Coolhand catalog.
No, Claude Opus 5.5 is currently active with no announced deprecation date.
Comparable options from Anthropic include the newer Claude Fable 5.1 and the lower-cost Claude Sonnet 5.
Claude Fable 5.1 is from the same provider (Anthropic) and a comparable pricing tier, but we haven't verified parameter compatibility — compare context windows where listed and check Anthropic's migration guide before switching. Recorded capabilities: Claude Opus 5.5 supports tool calling, structured output, reasoning, vision, streaming, and prompt caching; Claude Fable 5.1 supports tool calling, structured output, reasoning, vision, streaming, and prompt caching. A capability we haven't recorded isn't necessarily unsupported.
Call GET https://coolhandlabs.com/api/v2/inference_apis?q[source_api_eq]=anthropic&q[model_eq]=claude-opus-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 |
Track LLM pricing and deprecations automatically.
Start free