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Anthropic: Claude Opus 5.5

Claude model for long-running agentic coding and knowledge work

Source-linked claude-opus Closed weights Released 2026-09-22
API record Report
InputT
OutputT
Input price$4/M
Output price$20/M
Context1M
Max output128K
Providers17
Inference availability

Providers

Provider-specific identifiers, limits, and listed prices per million tokens. Every row links back to the provider's own documentation.

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Providers offering Claude Opus 5.5
ProviderProvider model IDContextMax outputInputOutputCache readCapabilitiesDocs
Vercel AI Gateway anthropic/claude-opus-5.5 1M 128K $4 $20 $0.2 ReasoningTools Docs ↗
Kilo Gateway anthropic/claude-opus-5.5 1M 128K $4 $20 $0.2 ReasoningToolsJSON Docs ↗
NanoGPT anthropic/claude-opus-5.5 1M 128K $4 $20 $0.2 ReasoningToolsJSON Docs ↗
Ofox anthropic/claude-opus-5.5 1M 128K $4 $20 $0.2 ReasoningTools Docs ↗
Merge Gateway anthropic/claude-opus-5-5 1M 128K $4 $20 $0.2 ReasoningToolsJSON Docs ↗
OpenRouter anthropic/claude-opus-5.5 1M 128K $4 $20 $0.2 ReasoningToolsJSON Docs ↗
OpenCode Zen claude-opus-5-5 1M 128K $4 $20 $0.2 ReasoningTools Docs ↗
Azure Cognitive Services claude-opus-5-5 1M 128K $4 $20 $0.2 ReasoningToolsJSON Docs ↗
Vertex claude-opus-5-5@default 1M 128K $4 $20 $0.2 ReasoningToolsJSON Docs ↗
Anthropic claude-opus-5-5 1M 128K $4 $20 $0.2 ReasoningToolsJSON Docs ↗
Azure claude-opus-5-5 1M 128K $4 $20 $0.2 ReasoningToolsJSON Docs ↗
Amazon Bedrock anthropic.claude-opus-5-5 1M 128K $4 $20 $0.2 ReasoningTools Docs ↗
Vertex (Anthropic) claude-opus-5-5@default 1M 128K $4 $20 $0.2 ReasoningToolsJSON Docs ↗
LLM Gateway anthropic/claude-opus-5-5 1M 128K $4 $20 $0.2 ReasoningToolsJSON Docs ↗
DevPass (LLM Gateway) claude-opus-5-5 1M 128K $4 $20 $0.2 ReasoningTools Docs ↗
Venice AI claude-opus-5-5 1M 128K $4.8 $24 $0.24 ReasoningToolsJSON Docs ↗
Requesty claude-opus-5-5 1M 128K $5 $25 $0.5 ReasoningToolsJSON Docs ↗

Capability badges appear only where the provider catalog explicitly lists support. A blank cell means the source is silent, not that the feature is absent.

Listed rates

Price across providers

Input price per million tokens as published by each provider. Bars are drawn from listed rates only — no traffic weighting, since the catalog observes no requests.

Lowest input $4/M

Across 17 priced providers

Median input $4/M

Midpoint of listed rates

Highest input $5/M

1.2× the lowest listed rate

Output range $20 – $25

Per million output tokens

Vercel AI Gateway $4/M
Kilo Gateway $4/M
NanoGPT $4/M
Ofox $4/M
Merge Gateway $4/M
OpenRouter $4/M
OpenCode Zen $4/M
Azure Cognitive Services $4/M
Vertex $4/M
Anthropic $4/M
Azure $4/M
Amazon Bedrock $4/M
Vertex (Anthropic) $4/M
LLM Gateway $4/M
DevPass (LLM Gateway) $4/M
Venice AI $4.8/M
Requesty $5/M
Cost calculator

Estimate a workload

$0.00
Excludes taxes, non-token charges, and tiered discounts.

15 providers list the identical $4 input rate, so price alone will not separate them — compare context limits, max output, and capabilities above.

Specification

Capabilities

Recorded from the source catalog and provider listings.

Reasoning Yes
Tool calling Yes
Structured output Yes
Attachments Yes
Vision input Yes
× Open weights No
Creator
Anthropic
Model family
claude-opus
Knowledge cutoff
2026-06
License
Not documented
Release date
2026-09-22
Model ID
anthropic/claude-opus-5-5
Published evaluations

Benchmarks

Every result stays attached to its source, version, metric and harness. Scores from different versions are never merged, and the profile below plots each benchmark against its own population rather than on a shared scale.

Benchmark registry
No published benchmark results

ModelBench does not infer quality from price, context size, or model name. When a source publishes a comparable result, it appears here with its version and link.

Read the methodology
Catalog activity

Change log

Field-level changes detected between successful source imports.

Full change log
No changes recorded

This record has not changed within the retained import history.

Provenance

Sources & verification

Every figure on this page traces back to one of these records.

Methodology
Public API

Use this record

Fetch the complete source-linked model record. No key, no account, no rate-limited tier.

API documentation
Endpoint
GET https://model.kyssta.lol/api/v1/models/anthropic/claude-opus-5-5
curl
curl "https://model.kyssta.lol/api/v1/models/anthropic/claude-opus-5-5"
Common questions

Frequently asked questions

Answered directly from the stored record — nothing here is generated beyond the catalog's own fields.

What is Claude Opus 5.5?

Claude model for long-running agentic coding and knowledge work. It is published by Anthropic and catalogued here from Models.dev.

How much does Claude Opus 5.5 cost?

Listed input pricing starts at $4 per million tokens from Vercel AI Gateway, rising to $5 across 17 listed providers.

What is the context length of Claude Opus 5.5?

Claude Opus 5.5 accepts up to 1M tokens of context and returns up to 128K output tokens.

Does Claude Opus 5.5 support tool calling and structured output?

Provider catalogs list support for tool calling, structured output, reasoning, and image input.

Which providers serve Claude Opus 5.5?

17 providers list this model: Vercel AI Gateway, Kilo Gateway, NanoGPT, Ofox, Merge Gateway, OpenRouter and 11 more.

Are the weights for Claude Opus 5.5 open?

No. This model is served through hosted APIs only.

When was Claude Opus 5.5 released?

The catalog records a release date of 2026-09-22, last verified Sep 23, 2026.

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