Claude Sonnet 4.5
by Anthropicanthropic/claude-sonnet-4.5
LLMCompare cannot run Claude Sonnet 4.5 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 Sonnet 4.5 at a glance
- Context length
- 1,000,000 tokens
- Maximum output
- 64,000 tokens
- Accepts
- Text, Image, File
- Returns
- Text
- Features
- JSON outputTool callingPrompt cachingImage input
- Reasoning effort levels
- Not supported
- Released
- 29 Sep 2025
- Knowledge cutoff
- 31 January 2025
Model facts synced from the OpenRouter model list on 21 Oct 2026.
Claude Sonnet 4.5 pricing by route
A route is the service LLMCompare calls to reach the model. Claude Sonnet 4.5 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 | $3.00 | $15.00 | $0.30 | $3.75 | openrouter.ai/anthropic/claude-sonnet-4.5 |
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 Sonnet 4.5 costs. The starting numbers are examples. Change them to match your task.
Part of the input tokens above, billed at the cache read price.
- Cost per call
- $0.0105
- 13 credits
- Cost of 100 calls
- $1.05
- 1,300 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 |
|---|---|---|---|
temperature | Number | 0 to 2in steps of 0.1 | Provider default |
top_p | Number | 0 to 1in steps of 0.05 | Provider default |
max_tokens | Integer | 1 to 64,000 | Provider default |
response_format | One of | textjson_object | Provider default |
About Claude Sonnet 4.5
Claude Sonnet 4.5 is Anthropic’s most advanced Sonnet model to date, optimized for real-world agents and coding workflows. It delivers state-of-the-art performance on coding benchmarks such as SWE-bench Verified, with...
Description as published for this model. LLMCompare has not edited it.
Models to compare with Claude Sonnet 4.5
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 Sonnet 4.6Anthropicanthropic/claude-sonnet-4.6 | 1M | 128k | $3.00 | $15.00 | ReasoningJSONToolsCacheVision | No route yet | ||
Claude Opus 5.5Anthropicanthropic/claude-opus-5.5 | 1M | 128k | $4.00 | $20.00 | ReasoningJSONToolsCacheVision | No route yet | ||
Claude Sonnet 5.5Anthropicanthropic/claude-sonnet-5.5 | 1M | 128k | $2.00 | $10.00 | ReasoningJSONToolsCacheVision | No route yet | ||
Ember-1Fireworksfireworks/ember-1 | 1.05M | 944k | $3.00 | $15.00 | ReasoningJSONToolsCacheVision | No route yet | ||
Sonar Pro SearchPerplexityperplexity/sonar-pro-search | 200k | 8k | $3.00 | $15.00 | JSONVision | No route yet | ||
Sonar ProPerplexityperplexity/sonar-pro | 200k | 8k | $3.00 | $15.00 | Vision | No route yet |
Questions about Claude Sonnet 4.5
- How much does Claude Sonnet 4.5 cost?
- On the OpenRouter route, Claude Sonnet 4.5 costs $3.00 per 1 million input tokens and $15.00 per 1 million output tokens, in US dollars. Input tokens that Claude Sonnet 4.5 reads from the prompt cache cost $0.30 per 1 million tokens. LLMCompare verified this price on 21 Oct 2026.
- What is the context length of Claude Sonnet 4.5?
- Claude Sonnet 4.5 has a context length of 1,000,000 tokens and returns up to 64,000 output tokens in one call.
- What inputs does Claude Sonnet 4.5 accept?
- Claude Sonnet 4.5 accepts these inputs: Text, Image, File. Claude Sonnet 4.5 returns: Text.
- Can I test Claude Sonnet 4.5 on my own data?
- Not yet. LLMCompare lists the prices and parameters of Claude Sonnet 4.5, but no route to Claude Sonnet 4.5 is configured on LLMCompare, so it cannot be selected for an evaluation.