Claude Opus 4.5 is Anthropic's highly capable model for complex coding, long-context reasoning, and agentic workflows. Supports text and image inputs. Token-based pricing: $3.00/M input tokens, $15.00/M output tokens. Two endpoints: standard async (/claude-opus-4-5) and live streaming (/claude-opus-4-5/stream) via SSE.
About this model
Claude Opus 4.5 is Anthropic's highly capable model, optimized for complex coding, long-context reasoning, and agentic workflows. It delivers strong debugging, code review, and large-context performance — ideal for demanding engineering and knowledge-work tasks. Pricing: $3.00 per million input tokens and $15.00 per million output tokens — significantly below official Anthropic pricing.
Cost analysis
| Provider | Cost | Notes |
|---|---|---|
| muapiapp | $3.00/M input tokens, $15.00/M output tokens | Token-based billing. Minimum $0.0006 per call. ~60% of official Anthropic pricing. |
| Anthropic (official) | ~$5.00/M input tokens, ~$25.00/M output tokens | Official pricing via api.anthropic.com. |
| Fal.ai | Not available | Claude Opus 4.5 is not available on Fal.ai. |
Token-based billing. Minimum $0.0006 per call. ~60% of official Anthropic pricing.
Official pricing via api.anthropic.com.
Claude Opus 4.5 is not available on Fal.ai.
** Competitor pricing is estimated based on similar model architectures and usage tiers.
Configuration schema
| Parameter | Type | Description | Default |
|---|---|---|---|
| Prompt | string | The user message or instruction. | Review this code and suggest improvements for performance and readability. |
| Image URL | string | Optional image URL for multimodal requests. | undefined |
| System Prompt | string | Optional system-level instruction to guide model behavior. | You are an expert software architect. |
The user message or instruction.
Review this code and suggest improvements for performance and readability.Optional image URL for multimodal requests.
undefinedOptional system-level instruction to guide model behavior.
You are an expert software architect.Developer documentation
POST /api/v1/claude-opus-4-5 — returns request_id, poll for result via /api/v1/predictions/{id}/result.
POST /api/v1/claude-opus-4-5/stream — returns a live SSE stream. Each chunk: data: {"choices":[{"delta":{"content":"text"}}]}, ending with data: [DONE].
See Streaming Documentation for full code examples.
Frequently asked
Pricing is token-based: $3.00 per million input tokens and $15.00 per million output tokens. The minimum charge per call is $0.0006. Actual cost is deducted after each call based on token counts returned by the model.
All Opus models share the same pricing tier. Use whichever version best fits your requirements — Opus 4.8 is the latest iteration while Opus 4.5 is a highly stable previous version.
Yes. Pass an image_url in the request body to include an image as part of the user message.