Muse Spark 1.3 API

Model details

Context window

1.0M tokens

Max output

1.0M tokens

Input

Text, images

Output

Text

Capabilities

Reasoning, Vision, Tool calling, Streaming, JSON output

Interfaces

OpenAI-style Chat Completions, Anthropic-style Messages, OpenAI-style Responses

Why teams pick it

• Muse Spark 1.3 for OpenAI-style Chat Completions, Anthropic-style Messages, OpenAI-style Responses.

Call Muse Spark 1.3

Muse Spark 1.3 answers on any of the APIs below — pick the one your code already speaks and just swap in your Inferray key.

curl https://api.inferray.com/v1/chat/completions \
  -H "Authorization: Bearer inferray_..." \
  -H "Content-Type: application/json" \
  -d '{
  "model": "muse-spark-1.3",
  "messages": [
    {
      "role": "user",
      "content": "Hello"
    }
  ]
}'

curl https://api.inferray.com/v1/messages \
  -H "Authorization: Bearer inferray_..." \
  -H "Content-Type: application/json" \
  -d '{
  "model": "muse-spark-1.3",
  "max_tokens": 1024,
  "messages": [
    {
      "role": "user",
      "content": "Hello"
    }
  ]
}'

curl https://api.inferray.com/v1/responses \
  -H "Authorization: Bearer inferray_..." \
  -H "Content-Type: application/json" \
  -d '{
  "model": "muse-spark-1.3",
  "input": "Hello"
}'

Use Muse Spark 1.3 in your tools

Every coding agent below has a setup guide. Set the model to muse-spark-1.3.

• Claude Code
• Codex
• opencode
• Cline
• Roo Code
• Aider
• Continue

More from Meta

Alternatives to Muse Spark 1.3

• Claude Haiku 4.5Fast and efficient for high-volume, low-latency work.Anthropic
• GPT-6.1 TerraFast GPT-6.1 for visual reasoning, computer use, and writing.OpenAI
• GLM-4.5 AirXGLM-4.5 AirX for OpenAI-style Chat Completions, Anthropic-style Messages, OpenAI-style Responses.Z.ai

Questions about this model

How much does the Muse Spark 1.3 API cost?

Muse Spark 1.3 costs $1.25 per 1M input tokens and $4.25 per 1M output tokens on Inferray, and cached input is $0.15 per 1M. That is the list price, with no gateway fee on top.

Is there a free tier for Muse Spark 1.3?

No. You add credit and pay Muse Spark 1.3's list rate for each request — seats, projects, and API keys are free, and pay-as-you-go credit never expires.

Am I charged for failed requests?

No. A request that fails without returning a result is not billed. If a response fails part-way, the tokens already processed before the failure are charged.

Is Muse Spark 1.3 included in Token Plans?

No. Muse Spark 1.3 is pay-as-you-go only; Token Plans cover the other text models in the catalog.

Can I use Muse Spark 1.3 in Claude Code?

Yes. Set ANTHROPIC_BASE_URL to https://api.inferray.com, ANTHROPIC_AUTH_TOKEN to your Inferray key, and ANTHROPIC_MODEL to muse-spark-1.3. The same key works in Codex, opencode, Cline, and other agents.

Does Muse Spark 1.3 support tool calling and vision?

Muse Spark 1.3 supports tool calling, image input, reasoning, JSON output and streaming on Inferray.

Is it the real Muse Spark 1.3?

Yes. A request for muse-spark-1.3 is answered by Muse Spark 1.3 from Meta, billed at its published list price. Inferray never substitutes a different or smaller model.