Muse Spark 1.3
Meta Superintelligence Labs' closed-weight flagship, an update to Muse Spark 1.2 tuned for long-horizon agentic and coding workflows.
Key Specifications
- Context window
- 1M tokens
- Released
- Inputs
- Text, image, video
- Capabilities Show details
- Reasoning Thinks before it answers, always on or as a switchable mode. Function calling Connect to external tools, APIs, and systems. Structured output Return responses in structured formats like JSON. Web search Search the web for up-to-date information. File upload Process uploaded documents, spreadsheets, and other files.
Hosted API pricing
| Provider | Input / 1M tokens | Output / 1M tokens | Cached input / 1M | Cost at 10M in + 2M out | |
|---|---|---|---|---|---|
|
Meta
Creator
|
$1.25 | $4.25 | $0.15 | $21.00 | View |
Heads up: Base-tier, on-demand rates per 1M tokens; cached, batch and long-context tiers excluded. A provider may serve a shorter context or a quantized build than the creator's release. Verify before provisioning. More on how we price.
Similarly priced models
The models nearest Muse Spark 1.3 by blended rate, each at its own cheapest provider.
| Model | Blended / 1M | Input / 1M | Output / 1M | Context | Cutoff | vs Muse Spark 1.3 |
|---|---|---|---|---|---|---|
GLM-5V-Turbo
Z.AI
|
$1.6667 | $1.20 | $4.00 | 205K | −5% | |
Qwen3-Coder-Plus
Alibaba Cloud
|
$1.6667 | $1.00 | $5.00 | 1M | −5% | |
|
Qwen3.7-Max
Alibaba Cloud
|
$1.6667 | $1.25 | $3.75 | 1M | −5% | |
|
Muse Spark 1.1
Meta
|
$1.75 | $1.25 | $4.25 | 1M | 0% | |
|
Muse Spark 1.2
Meta
|
$1.75 | $1.25 | $4.25 | 1M | 0% | |
|
Muse Spark 1.3
This model
Meta
|
$1.75 | $1.25 | $4.25 | 1M | ||
|
GLM-5.1
Z.AI
|
$1.8833 | $1.38 | $4.40 | 205K | +8% | |
|
GLM-5.3
Z.AI
|
$1.90 | $1.40 | $4.40 | 1M | +9% | |
Mistral Medium 3.5
Mistral
|
$2.50 | $1.50 | $7.50 | 256K | +43% | |
Grok 4.5
xAI
|
$2.6667 | $2.00 | $6.00 | 500K | Feb 2026 | +52% |
|
Grok 4.6
xAI
|
$2.6667 | $2.00 | $6.00 | 500K | Jan 2026 | +52% |
Prices are USD per 1M tokens at each model's cheapest listed provider. Blended is the cost of 10M input plus 2M output tokens, spread over the 12M.
Frequently Asked Questions
What is Muse Spark 1.3 good for?
Long-horizon coding agents and multi-step tool use, from Meta's own Model API and its Muse Code terminal agent. Meta says it tracks context and prior results across a long task, works through conflicting inputs and asks for input when it needs it.
When is Muse Spark 1.3 not a good fit?
Self-hosting: the weights are closed, and Meta has published no parameter count or maximum output. It sits at the top of Meta's price range, and Meta says the max reasoning mode is held back pending further safety testing. For open weights from Meta, look at Muse Glimmer 30B or the Llama models.
What is the cheapest way to run Muse Spark 1.3?
The cheapest hosted rate is $1.25 / $4.25 per 1M tokens via Meta.
How does Muse Spark 1.3 compare with Muse Spark 1.2?
Meta says Muse Spark 1.3 improves on 1.2 across agentic and coding tasks: it sustains longer-horizon work, follows multi-step instructions more reliably, uses fewer tool calls and tokens on coding, and resists prompt injection better. Same price, 1M-token context and text, image and video input.
Can I self-host Muse Spark 1.3?
No. Meta does not publish the weights; Muse Spark 1.3 is available only through hosted APIs.
More from Meta
| Model | Context | Input / 1M | Output / 1M |
|---|---|---|---|
|
Muse Spark 1.1
|
1M | $1.25 | $4.25 |
|
Muse Spark 1.2
|
1M | $1.25 | $4.25 |
|
Llama 3 70B
Open weights
|
8K | $0.65 | $2.75 |
|
Muse Glimmer 30B
Open weights
|
131K | $0.35 | $1.50 |
|
Llama 4 Maverick
Open weights
|
1M | $0.25 | $0.95 |
|
Llama 4 Scout
Open weights
|
10M | $0.16 | $0.64 |
|
Llama 3.3 70B
Open weights
|
128K | $0.13 | $0.40 |
|
Llama 3.2 11B Vision
Open weights
|
128K | $0.05 | $0.68 |