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AnthropicClaude Opus 5.5
A Claude model for large code changes, detailed research and business tasks that take many steps.
Plain-English overview
What Claude Opus 5.5 actually is
Opus 5.5 works with text and images and produces text. Its million-token context window can hold substantial reference material, while tools let an application connect it to files, search and other services.
Standard input and output tokens cost 20% less than Opus 5. Adaptive thinking is always on, with medium effort by default. Compare the total cost of a finished task, not just its token price.
Good fit for
- Codebase changes
- Multi-step workflows
Category comparison
The facts that matter for text models
These are provider-published specifications, not Cody benchmark scores. Follow the linked sources for current limits and endpoint-specific exceptions.
- Context window
- 1M tokensMaximum combined prompt and working context documented by the provider.
- Maximum output
- 128K tokensProvider-published response limit, where available.
- Knowledge cutoff
- June 2026Latest reliable knowledge date explicitly published by the model provider. Search and connected tools can retrieve newer information but do not change the model's built-in cutoff.
- Input price
- $4 / 1MCurrent standard list price per million input tokens unless noted.
- Output price
- $20 / 1MCurrent standard list price per million output tokens unless noted.
- Inputs
- Text, imageMedia types accepted by the listed model endpoint.
- Tools & agents
- Tool use, agents, vision, coding workflowsSelected native tools and agent-building capabilities, not an exhaustive list.
Pricing & comparisons
Estimate your cost
Set your usage. Your estimate updates as you type.
Example: 6,000 input tokens for 10 pages, plus a 500-token summary. Page lengths vary; adjust the numbers below.
One run sends your input to the model once and receives an answer. Tokens are pieces of text: input is what you send, output is the answer you receive.
Advanced options
Claude Opus 5.5
Anthropic
Estimated total (USD)
For the usage above · USD · API pricing, not a subscription
- Input tokens
- $4.00 per 1M tokens
- Output tokens
- $20.00 per 1M tokens
How this estimate works
Estimates exclude taxes, tools, cache storage/writes, free allowances and custom discounts. Image estimates cover output only, not prompt or reference-image charges. Quality modes differ by model. Unlisted settings are not treated as free.
API and provider access
Where to get Claude Opus 5.5
Availability
Regions and access stage
Available through Claude Platform, AWS, Google Cloud, Microsoft Foundry, and supported marketplaces.
Direct access depends on Anthropic's supported-country list; cloud regions and marketplace eligibility vary.
Check live availabilityData and training
The route matters.
Anthropic does not train on API data without express permission. Retention depends on the API feature, account agreement and cloud provider.
This is a concise reading of the cited provider material, not legal advice. A third-party gateway can have different storage, routing, training, and residency terms from the model maker's direct API.
Read the provider policyFrequently asked questions
Claude Opus 5.5 FAQ
What is Claude Opus 5.5?
A Claude model for large code changes, detailed research and business tasks that take many steps. Opus 5.5 works with text and images and produces text. Its million-token context window can hold substantial reference material, while tools let an application connect it to files, search and other services.
When was Claude Opus 5.5 released?
Claude Opus 5.5 was released on September 22, 2026 according to the cited provider materials.
Where can I access Claude Opus 5.5?
Available through Claude Platform, AWS, Google Cloud, Microsoft Foundry, and supported marketplaces. The access routes listed in this guide are Anthropic and AWS, Google Cloud, Microsoft.
How much does Claude Opus 5.5 cost?
$4 input · $20 output / 1M tokens. Standard Claude API rates. Cache writes, tools and regional premiums can add to the bill.
Where is Claude Opus 5.5 available?
Available through Claude Platform, AWS, Google Cloud, Microsoft Foundry, and supported marketplaces. Direct access depends on Anthropic's supported-country list; cloud regions and marketplace eligibility vary.
Is my Claude Opus 5.5 API data used for training?
Anthropic does not train on API data without express permission. Retention depends on the API feature, account agreement and cloud provider. The policy belongs to the provider route and account terms, so verify it again before production use.
Price comparison
One price per model, using the same input/output mix. We weight each API rate by its share of one million total tokens and use the lowest matching reviewed route. This is a comparison rate, not a cost per task or a quality score. Tokenizers, caching, reasoning and long context can change your actual bill.
75% input + 25% output · no cache discounts
- GPT-6 Luna$0.20
OpenAI
- Mistral Small 4$0.2625
Mistral AI
- GPT-5.6 Luna$0.45
OpenAI
- Gemini 3.8 Flash$1.50
Google
- Claude Haiku 4.5$2.00
Anthropic
- GPT-6 Sol$4.00
OpenAI
- Claude Sonnet 5$4.00
Anthropic
- GPT-5.6 Terra$4.50
OpenAI
- Daybreak Blue$8.00
OpenAI
- Claude Opus 5.5$8.00
Anthropic
This model
- GPT-5.6 Sol$8.00
OpenAI
- Claude Opus 5$10.00
Anthropic
- Claude Fable 5$20.00
Anthropic
- GPT-6 Astra$20.00
OpenAI
- Claude Fable 5.1$20.00
Anthropic
Related comparisons
Head-to-head comparisons
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Open full comparisonClaude Opus 5.5 vs GPT-5.6 Terra
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Open full comparisonClaude Opus 5.5 vs Claude Sonnet 5
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Open full comparisonClaude Opus 5.5 vs Claude Haiku 4.5
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Open full comparisonClaude Opus 5.5 vs GPT-6 Astra
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Open full comparisonClaude Opus 5.5 vs GPT-5.6 Sol
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Open full comparisonClaude Opus 5.5 vs Claude Fable 5.1
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Open full comparisonClaude Opus 5.5 vs Gemini 3.8 Flash
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Open full comparisonClaude Opus 5.5 vs Grok 4.6
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Open full comparisonClaude Opus 5.5 vs Grok 4.20 Multi-Agent Beta
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Open full comparisonClaude Opus 5.5 vs Inkling
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Open full comparisonClaude Opus 5.5 vs Mistral Medium 3.5
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Open full comparisonClaude Opus 5.5 vs Mistral Small 4
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Open full comparisonClaude Opus 5.5 vs Qwen3.8 Max
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Open full comparisonClaude Opus 5.5 vs MiniMax M3
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Open full comparisonClaude Opus 5.5 vs GLM-5.3
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Open full comparisonClaude Opus 5.5 vs Kimi K3
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Open full comparisonClaude Opus 5.5 vs Falcon-H1R-7B
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Open full comparisonClaude Opus 5.5 vs Falcon-H1-34B-Instruct
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Open full comparisonClaude Opus 5.5 vs Muse Spark 1.3
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Open full comparisonClaude Opus 5.5 vs Celeris-1 Magnus
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Open full comparisonClaude Opus 5.5 vs NVIDIA Nemotron 3 Ultra
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Open full comparisonClaude Opus 5.5 vs NVIDIA Nemotron 3.5 Lightning
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Open full comparisonClaude Opus 5.5 vs Qwen3.8-Flash
Alibaba's efficient million-context multimodal model for fast agents, coding, document work, vision, video understanding, and tool use.
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Open full comparisonClaude Opus 5.5 vs DeepSeek-V4-Flash
DeepSeek's lower-cost V4 model for high-volume reasoning, coding, agents, and million-token text workloads.
Open full comparison
