Model Comparison

Gemma 2 27B vs Jamba 1.5 MiniWhich is better in 2026?

Jamba 1.5 Mini shows notably better performance in the majority of benchmarks.

Verdict: Gemma 2 27B vs Jamba 1.5 Mini — which is better?

Gemma 2 27B (by Google) and Jamba 1.5 Mini (by AI21 Labs) 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.

Gemma 2 27B outperforms in 1 benchmarks (MMLU), while Jamba 1.5 Mini is better at 2 benchmarks (ARC-C, GSM8k). Jamba 1.5 Mini shows notably better performance in the majority of benchmarks.

Choose Gemma 2 27B if…

  • you are already invested in the Google ecosystem

Choose Jamba 1.5 Mini if…

  • you want the strongest raw capability — it leads on 2 of 3 shared benchmarks
  • you want the most recent training data — it shipped Aug 2024

Performance Benchmarks

Comparative analysis across standard metrics

3 benchmarks

Gemma 2 27B outperforms in 1 benchmarks (MMLU), while Jamba 1.5 Mini is better at 2 benchmarks (ARC-C, GSM8k).

Jamba 1.5 Mini shows notably better performance in the majority of benchmarks.

Sun Jul 05 2026 • llm-stats.com

Arena Performance

Human preference votes

Model Size

Parameter count comparison

24.8B diff

Jamba 1.5 Mini has 24.8B more parameters than Gemma 2 27B, making it 91.2% larger.

Google
Gemma 2 27B
27.2Bparameters
AI21 Labs
Jamba 1.5 Mini
52.0Bparameters
27.2B
Gemma 2 27B
52.0B
Jamba 1.5 Mini

Context Window

Maximum input and output token capacity

Only Jamba 1.5 Mini specifies input context (256,144 tokens). Only Jamba 1.5 Mini specifies output context (256,144 tokens).

Google
Gemma 2 27B
Input- tokens
Output- tokens
AI21 Labs
Jamba 1.5 Mini
Input256,144 tokens
Output256,144 tokens
Sun Jul 05 2026 • llm-stats.com

License

Usage and distribution terms

Gemma 2 27B is licensed under Gemma, while Jamba 1.5 Mini uses Jamba Open Model License.

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

Gemma 2 27B

Gemma

Open weights

Jamba 1.5 Mini

Jamba Open Model License

Open weights

Release Timeline

When each model was launched

Gemma 2 27B was released on 2024-06-27, while Jamba 1.5 Mini was released on 2024-08-22.

Jamba 1.5 Mini is 2 months newer than Gemma 2 27B.

Gemma 2 27B

Jun 27, 2024

2.0 years ago

Jamba 1.5 Mini

Aug 22, 2024

1.9 years ago

1mo newer

Knowledge Cutoff

When training data ends

Jamba 1.5 Mini has a documented knowledge cutoff of 2024-03-05, while Gemma 2 27B'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 Gemma 2 27B's cutoff date.

Gemma 2 27B

—

Jamba 1.5 Mini

Mar 2024

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

Google
Higher MMLU score (75.2% vs 69.7%)
AI21 Labs
Larger context window (256,144 tokens)
Higher ARC-C score (85.7% vs 71.4%)
Higher GSM8k score (75.8% vs 74.0%)

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Gemma 2 27B and Jamba 1.5 Mini side-by-side, then vote on the output you prefer.

Gemma 2 27B
✓ Preferred
Jamba 1.5 Mini
Open in Playground
AI Model Comparison Table
Feature
Google
Gemma 2 27B
AI21 Labs
Jamba 1.5 Mini

FAQ

Common questions about Gemma 2 27B vs Jamba 1.5 Mini.

Which is better, Gemma 2 27B or Jamba 1.5 Mini?

Jamba 1.5 Mini shows notably better performance in the majority of benchmarks. Gemma 2 27B is made by Google and Jamba 1.5 Mini is made by AI21 Labs. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Gemma 2 27B compare to Jamba 1.5 Mini in benchmarks?

Gemma 2 27B scores ARC-E: 88.6%, HellaSwag: 86.4%, BoolQ: 84.8%, TriviaQA: 83.7%, Winogrande: 83.7%. Jamba 1.5 Mini scores ARC-C: 85.7%, GSM8k: 75.8%, MMLU: 69.7%, TruthfulQA: 54.1%, Arena Hard: 46.1%.

What are the context window sizes for Gemma 2 27B and Jamba 1.5 Mini?

Gemma 2 27B supports an unknown number of tokens and Jamba 1.5 Mini supports 256K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Gemma 2 27B and Jamba 1.5 Mini?

Key differences include licensing (Gemma vs Jamba Open Model License). See the full comparison above for benchmark-by-benchmark results.

Who makes Gemma 2 27B and Jamba 1.5 Mini?

Gemma 2 27B is developed by Google and Jamba 1.5 Mini is developed by AI21 Labs.

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