Claude Opus 5.5
by Anthropicanthropic/claude-opus-5.5
LLMCompare cannot run Claude Opus 5.5 yet.No route to this model is configured on this site yet. Its prices and parameters are listed below for reference.
See the models that can be run nowClaude Opus 5.5 at a glance
- Context length
- 1,000,000 tokens
- Maximum output
- 128,000 tokens
- Accepts
- Text, Image, File
- Returns
- Text
- Features
- ReasoningJSON outputTool callingPrompt cachingImage input
- Reasoning effort levels
maxxhighhighmediumlowReasoning is always on for this model.- Released
- 22 Sep 2026
- Knowledge cutoff
- Not published
Model facts synced from the OpenRouter model list on 21 Oct 2026.
Claude Opus 5.5 pricing by route
A route is the service LLMCompare calls to reach the model. Claude Opus 5.5 has 1 route. Prices are in US dollars.
| Route | On LLMCompare | Inputper 1M tokens | Outputper 1M tokens | Cache readper 1M tokens | Cache writeper 1M tokens | Price verified on | Source |
|---|---|---|---|---|---|---|---|
| OpenRouterDefault | Not configured | $4.00 | $20.00 | $0.20 | $5.00 | openrouter.ai/anthropic/claude-opus-5.5 |
The cost shown in an LLMCompare report is calculated from these prices as they were at the time of the run.
Cost calculator
Estimate what a batch of calls to Claude Opus 5.5 costs. The starting numbers are examples. Change them to match your task.
Part of the input tokens above, billed at the cache read price.
Billed in addition to the output tokens.
- Cost per call
- $0.014
- 17 credits
- Cost of 100 calls
- $1.40
- 1,700 credits
Calculated from the OpenRouter prices verified on 21 Oct 2026. Credits are the cost plus a 20% service fee, at $0.001 per credit, rounded up for each call, with a minimum of 1 per call. A real run is charged for the usage the provider reports.
Parameters you can set
These are the parameters LLMCompare can set when it calls the model through OpenRouter.
| Parameter | Type | Range or options | Default |
|---|---|---|---|
max_tokens | Integer | 1 to 128,000 | Provider default |
reasoning_effort | One of | maxxhighhighmediumlow | high |
response_format | One of | textjson_object | Provider default |
About Claude Opus 5.5
Claude Opus 5.5 is Anthropic's flagship model for demanding reasoning, coding, and long-horizon agentic work, succeeding Claude Opus 5. It is particularly strong at multi-step changes in large codebases, code...
Description as published for this model. LLMCompare has not edited it.
Models to compare with Claude Opus 5.5
Text models from the same provider and models at the nearest price. The order is not a ranking.
| Add to comparison | Model | Context | Max output | Input priceper 1M tokens | Output priceper 1M tokens | Features | Released | On LLMCompare |
|---|---|---|---|---|---|---|---|---|
Claude Opus 5Anthropicanthropic/claude-opus-5 | 1M | 128k | $5.00 | $25.00 | ReasoningJSONToolsCacheVision | No route yet | ||
Claude Opus 4.8Anthropicanthropic/claude-opus-4.8 | 1M | 128k | $5.00 | $25.00 | ReasoningJSONToolsCacheVision | No route yet | ||
Claude Opus 4.7Anthropicanthropic/claude-opus-4.7 | 1M | 128k | $5.00 | $25.00 | ReasoningJSONToolsCacheVision | No route yet | ||
Muse WonderMetameta/muse-wonder | 1.05M | 944k | $4.00 | $20.00 | ReasoningJSONToolsCacheVision | No route yet | ||
GPT-5.6 Sol ProOpenAIopenai/gpt-5.6-sol-pro | 1.05M | 128k | $4.00 | $20.00 | ReasoningJSONToolsCacheVision | No route yet | ||
GPT-5.6 SolOpenAIopenai/gpt-5.6-sol | 1.05M | 128k | $4.00 | $20.00 | ReasoningJSONToolsCacheVision | No route yet |
Questions about Claude Opus 5.5
- How much does Claude Opus 5.5 cost?
- On the OpenRouter route, Claude Opus 5.5 costs $4.00 per 1 million input tokens and $20.00 per 1 million output tokens, in US dollars. Input tokens that Claude Opus 5.5 reads from the prompt cache cost $0.20 per 1 million tokens. LLMCompare verified this price on 21 Oct 2026.
- What is the context length of Claude Opus 5.5?
- Claude Opus 5.5 has a context length of 1,000,000 tokens and returns up to 128,000 output tokens in one call.
- What inputs does Claude Opus 5.5 accept?
- Claude Opus 5.5 accepts these inputs: Text, Image, File. Claude Opus 5.5 returns: Text.
- Which reasoning effort levels does Claude Opus 5.5 support?
- Claude Opus 5.5 supports these reasoning effort levels: max, xhigh, high, medium, low. Reasoning is always on for Claude Opus 5.5 and cannot be turned off.
- Can I test Claude Opus 5.5 on my own data?
- Not yet. LLMCompare lists the prices and parameters of Claude Opus 5.5, but no route to Claude Opus 5.5 is configured on LLMCompare, so it cannot be selected for an evaluation.