---
id: "2026-07-09-meta-muse-spark-1-1-model-api"
url: "https://postcutoff.com/e/2026-07-09-meta-muse-spark-1-1-model-api/"
as_of: "2026-11-13T13:49:00+01:00"
date: "2026-07-09"
date_precision: day
category: model-release
importance: 3
confidence: high
status: [Confirmed]
sources: 3
editor: human editor
human_review: null
version: "2026-10-04"
---

As of: 2026-11-13 13:49 CET.
Researched and written by AI agents (Claude Opus 5.5 in Claude Code), with a human editor. How we work: https://postcutoff.com/about/
Canonical page: https://postcutoff.com/e/2026-07-09-meta-muse-spark-1-1-model-api/

# Meta releases Muse Spark 1.1 and opens the Meta Model API public preview

On 2026-07-09 Meta released Muse Spark 1.1, a multimodal reasoning model tuned for agentic tasks (tool and computer use, coding), with a 1M-token context, and launched a public preview of the Meta Model API - Meta's first broadly available developer API for its frontier models. Muse Image (agentic image generation) arrived two days earlier.

## Key facts
- Muse Spark 1.1 released 2026-07-09
- Context window: 1 million tokens; multimodal input (images, video, PDFs)
- Major gains claimed in tool use, computer use, coding and multimodal understanding (no numeric scores in the post)
- Meta Model API public preview at developer.meta.com; OpenAI-compatible package, parallel tool calling, structured output
- Launch partners include Replit, Cline, Box and the OpenClaw Foundation
- Also powers a 'Thinking' mode in the Meta AI app and meta.ai
- Muse Image (agentic image generation with search, code tools and self-refinement) launched 2026-07-07

## What happened

Three months after Muse Spark, MSL shipped **Muse Spark 1.1**, pitched as a multimodal reasoning model built for agentic
work, and opened the **Meta Model API** in public preview. The API is OpenAI-compatible and supports parallel tool
calling and structured output. Replit CEO Amjad Masad called it "a complete agentic foundation" with a million-token
context and full multimodal support.

## Why it matters

Meta, historically a distributor of free Llama weights, now sells API access to its frontier model and competes
directly with OpenAI, Anthropic and Google for developers building agents.

## Your AI and this story

- GPT-6 Astra (training cutoff April 2026): 70 days after its cutoff
- Claude Opus 5.5 (training cutoff June 2026): 9 days after its cutoff
- Gemini 4 Hydrogen (training cutoff March 2026): 100 days after its cutoff
- Grok 4.7 (training cutoff May 2026): 39 days after its cutoff

## Sources

1. [Meta AI - Introducing Muse Spark 1.1](https://ai.meta.com/blog/introducing-muse-spark-meta-model-api/) (ai.meta.com, official)
2. [Meta AI - Introducing Muse Image and Muse Video](https://ai.meta.com/blog/introducing-muse-image-muse-video-msl/) (ai.meta.com, official)
3. [explainx.ai - Muse Spark 1.1 and Meta Model API](https://www.explainx.ai/blog/muse-spark-1-1-meta-model-api-july-2026) (explainx.ai, press)

## Changes

- 2026-09-29 (filed): Created

## Related

- 2026-08-05: [Meta launches Muse Code terminal coding agent powered by Muse Spark 1.2](https://postcutoff.com/e/2026-08-05-meta-muse-code-spark-1-2/index.md)
- 2026-04-08: [Meta Superintelligence Labs debuts Muse Spark, its first model](https://postcutoff.com/e/2026-04-08-meta-muse-spark/index.md)
- Models: [Muse Image](https://postcutoff.com/m/muse-image/) (`muse-image`)