Model Comparison

Gemma 3 1B vs Jamba 1.5 LargeWhich is better in 2026?

Jamba 1.5 Large significantly outperforms across most benchmarks.

Verdict: Gemma 3 1B vs Jamba 1.5 Large — which is better?

Gemma 3 1B (by Google) and Jamba 1.5 Large (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 3 1B outperforms in 0 benchmarks, while Jamba 1.5 Large is better at 3 benchmarks (GPQA, GSM8k, MMLU-Pro). Jamba 1.5 Large significantly outperforms across most benchmarks.

Choose Gemma 3 1B if…

  • you want the most recent training data — it shipped Mar 2025

Choose Jamba 1.5 Large if…

  • you want the strongest raw capability — it leads on 3 of 3 shared benchmarks

Performance Benchmarks

Comparative analysis across standard metrics

3 benchmarks

Gemma 3 1B outperforms in 0 benchmarks, while Jamba 1.5 Large is better at 3 benchmarks (GPQA, GSM8k, MMLU-Pro).

Jamba 1.5 Large significantly outperforms across most benchmarks.

Sat Jun 27 2026 • llm-stats.com

Arena Performance

Human preference votes

Model Size

Parameter count comparison

397.0B diff

Jamba 1.5 Large has 397.0B more parameters than Gemma 3 1B, making it 39700.0% larger.

Google
Gemma 3 1B
1.0Bparameters
AI21 Labs
Jamba 1.5 Large
398.0Bparameters
1.0B
Gemma 3 1B
398.0B
Jamba 1.5 Large

Context Window

Maximum input and output token capacity

Only Jamba 1.5 Large specifies input context (256,000 tokens). Only Jamba 1.5 Large specifies output context (256,000 tokens).

Google
Gemma 3 1B
Input- tokens
Output- tokens
AI21 Labs
Jamba 1.5 Large
Input256,000 tokens
Output256,000 tokens
Sat Jun 27 2026 • llm-stats.com

License

Usage and distribution terms

Gemma 3 1B is licensed under Gemma, while Jamba 1.5 Large uses Jamba Open Model License.

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

Gemma 3 1B

Gemma

Open weights

Jamba 1.5 Large

Jamba Open Model License

Open weights

Release Timeline

When each model was launched

Gemma 3 1B was released on 2025-03-12, while Jamba 1.5 Large was released on 2024-08-22.

Gemma 3 1B is 7 months newer than Jamba 1.5 Large.

Gemma 3 1B

Mar 12, 2025

1.3 years ago

6mo newer
Jamba 1.5 Large

Aug 22, 2024

1.8 years ago

Knowledge Cutoff

When training data ends

Jamba 1.5 Large has a documented knowledge cutoff of 2024-03-05, while Gemma 3 1B's cutoff date is not specified.

We can confirm Jamba 1.5 Large's training data extends to 2024-03-05, but cannot make a direct comparison without Gemma 3 1B's cutoff date.

Gemma 3 1B

—

Jamba 1.5 Large

Mar 2024

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

Google

No standout differentiators in the data we have for this pair.

AI21 Labs
Larger context window (256,000 tokens)
Higher GPQA score (36.9% vs 19.2%)
Higher GSM8k score (87.0% vs 62.8%)
Higher MMLU-Pro score (53.5% vs 14.7%)

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Gemma 3 1B and Jamba 1.5 Large side-by-side, then vote on the output you prefer.

Gemma 3 1B
✓ Preferred
Jamba 1.5 Large
Open in Playground
AI Model Comparison Table
Feature
Google
Gemma 3 1B
AI21 Labs
Jamba 1.5 Large

FAQ

Common questions about Gemma 3 1B vs Jamba 1.5 Large.

Which is better, Gemma 3 1B or Jamba 1.5 Large?

Jamba 1.5 Large significantly outperforms across most benchmarks. Gemma 3 1B is made by Google and Jamba 1.5 Large is made by AI21 Labs. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Gemma 3 1B compare to Jamba 1.5 Large in benchmarks?

Gemma 3 1B scores IFEval: 80.2%, GSM8k: 62.8%, Natural2Code: 56.0%, MATH: 48.0%, HumanEval: 41.5%. Jamba 1.5 Large scores ARC-C: 93.0%, GSM8k: 87.0%, MMLU: 81.2%, Arena Hard: 65.4%, TruthfulQA: 58.3%.

What are the context window sizes for Gemma 3 1B and Jamba 1.5 Large?

Gemma 3 1B supports an unknown number of tokens and Jamba 1.5 Large 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 3 1B and Jamba 1.5 Large?

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

Who makes Gemma 3 1B and Jamba 1.5 Large?

Gemma 3 1B is developed by Google and Jamba 1.5 Large is developed by AI21 Labs.

Related comparisons