Model Comparison

Jamba 1.5 Mini vs Muse Spark 1.1Which is better in 2026?

Comparing Jamba 1.5 Mini and Muse Spark 1.1 across benchmarks, pricing, and capabilities.

Verdict: Jamba 1.5 Mini vs Muse Spark 1.1 — which is better?

Jamba 1.5 Mini (by AI21 Labs) and Muse Spark 1.1 (by Meta) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.

On price, Jamba 1.5 Mini is roughly 8.0x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Muse Spark 1.1 also accepts a larger context window (1,048,576 input tokens), making it the stronger choice for long documents and large codebases.

Choose Jamba 1.5 Mini if…

  • cost matters — it's about 8.0x cheaper per token
  • you need open weights you can self-host or fine-tune

Choose Muse Spark 1.1 if…

  • you process long inputs — it offers a 1,048,576 token context window
  • you want the most recent training data — it shipped Jul 2026

Performance Benchmarks

Comparative analysis across standard metrics

No common benchmarks found

Jamba 1.5 Mini and Muse Spark 1.1don't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Jamba 1.5 Mini costs less

For input processing, Jamba 1.5 Mini ($0.20/1M tokens) is 6.3x cheaper than Muse Spark 1.1 ($1.25/1M tokens).

For output processing, Jamba 1.5 Mini ($0.40/1M tokens) is 10.6x cheaper than Muse Spark 1.1 ($4.25/1M tokens).

In conclusion, Muse Spark 1.1 is more expensive than Jamba 1.5 Mini.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Sun Jul 19 2026 • llm-stats.com
AI21 Labs
Jamba 1.5 Mini
Input tokens$0.20
Output tokens$0.40
Best providerAWS Bedrock
Meta
Muse Spark 1.1
Input tokens$1.25
Output tokens$4.25
Best providerMeta
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Muse Spark 1.1 accepts 1,048,576 input tokens compared to Jamba 1.5 Mini's 256,144 tokens. Jamba 1.5 Mini can generate longer responses up to 256,144 tokens, while Muse Spark 1.1 is limited to 131,072 tokens.

AI21 Labs
Jamba 1.5 Mini
Input256,144 tokens
Output256,144 tokens
Meta
Muse Spark 1.1
Input1,048,576 tokens
Output131,072 tokens
Sun Jul 19 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Muse Spark 1.1 supports multimodal inputs, whereas Jamba 1.5 Mini does not.

Muse Spark 1.1 can handle both text and other forms of data like images, making it suitable for multimodal applications.

Jamba 1.5 Mini

Text
Images
Audio
Video

Muse Spark 1.1

Text
Images
Audio
Video

License

Usage and distribution terms

Jamba 1.5 Mini is licensed under Jamba Open Model License, while Muse Spark 1.1 uses a proprietary license.

License differences may affect how you can use these models in commercial or open-source projects.

Jamba 1.5 Mini

Jamba Open Model License

Open weights

Muse Spark 1.1

Proprietary

Closed source

Release Timeline

When each model was launched

Jamba 1.5 Mini was released on 2024-08-22, while Muse Spark 1.1 was released on 2026-07-09.

Muse Spark 1.1 is 23 months newer than Jamba 1.5 Mini.

Jamba 1.5 Mini

Aug 22, 2024

1.9 years ago

Muse Spark 1.1

Jul 9, 2026

1 weeks ago

1.9yr newer

Knowledge Cutoff

When training data ends

Jamba 1.5 Mini has a documented knowledge cutoff of 2024-03-05, while Muse Spark 1.1's cutoff date is not specified.

We can confirm Jamba 1.5 Mini's training data extends to 2024-03-05, but cannot make a direct comparison without Muse Spark 1.1's cutoff date.

Jamba 1.5 Mini

Mar 2024

Muse Spark 1.1

—

Provider Availability

Jamba 1.5 Mini is available from Bedrock, Google. Muse Spark 1.1 is available from Meta Model API.

Jamba 1.5 Mini

bedrock logo
AWS Bedrock
Input Price:Input: $0.20/1MOutput Price:Output: $0.40/1M
google logo
Google
Input Price:Input: $0.20/1MOutput Price:Output: $0.40/1M

Muse Spark 1.1

meta logo
Meta
Input Price:Input: $1.25/1MOutput Price:Output: $4.25/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

AI21 Labs
Less expensive input tokens
Less expensive output tokens
Has open weights
Meta
Larger context window (1,048,576 tokens)
Supports multimodal inputs

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Jamba 1.5 Mini and Muse Spark 1.1 side-by-side, then vote on the output you prefer.

Jamba 1.5 Mini
✓ Preferred
Muse Spark 1.1
Open in Playground
AI Model Comparison Table
Feature
AI21 Labs
Jamba 1.5 Mini
Meta
Muse Spark 1.1

FAQ

Common questions about Jamba 1.5 Mini vs Muse Spark 1.1.

Which is better, Jamba 1.5 Mini or Muse Spark 1.1?

Jamba 1.5 Mini (AI21 Labs) and Muse Spark 1.1 (Meta) each have strengths in different areas. Compare their benchmark scores, pricing, context windows, and capabilities above to determine which fits your needs.

How does Jamba 1.5 Mini compare to Muse Spark 1.1 in benchmarks?

Jamba 1.5 Mini scores ARC-C: 85.7%, GSM8k: 75.8%, MMLU: 69.7%, TruthfulQA: 54.1%, Arena Hard: 46.1%. Muse Spark 1.1 scores CharXiv-R: 88.4%, MCP Atlas: 88.1%, OSWorld-Verified: 80.8%, Terminal-Bench 2.1: 80.0%, BabyVision: 76.3%.

Is Jamba 1.5 Mini cheaper than Muse Spark 1.1?

Jamba 1.5 Mini is 6.3x cheaper for input tokens. Jamba 1.5 Mini costs $0.20/M input and $0.40/M output via bedrock. Muse Spark 1.1 costs $1.25/M input and $4.25/M output via meta.

What are the context window sizes for Jamba 1.5 Mini and Muse Spark 1.1?

Jamba 1.5 Mini supports 256K tokens and Muse Spark 1.1 supports 1.0M tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Jamba 1.5 Mini and Muse Spark 1.1?

Key differences include context window (256K vs 1.0M), input pricing ($0.20 vs $1.25/M), multimodal support (no vs yes), licensing (Jamba Open Model License vs Proprietary). See the full comparison above for benchmark-by-benchmark results.

Who makes Jamba 1.5 Mini and Muse Spark 1.1?

Jamba 1.5 Mini is developed by AI21 Labs and Muse Spark 1.1 is developed by Meta.

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