Model Comparison

Jamba 1.5 Mini vs Phi 4 MiniWhich is better in 2026?

Jamba 1.5 Mini has a slight edge in benchmark performance.

Verdict: Jamba 1.5 Mini vs Phi 4 Mini — which is better?

Jamba 1.5 Mini (by AI21 Labs) and Phi 4 Mini (by Microsoft) 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.

Jamba 1.5 Mini outperforms in 4 benchmarks (ARC-C, Arena Hard, GPQA, MMLU), while Phi 4 Mini is better at 3 benchmarks (GSM8k, MMLU-Pro, TruthfulQA). Jamba 1.5 Mini has a slight edge in benchmark performance.

Choose Jamba 1.5 Mini if…

  • you want the strongest raw capability — it leads on 4 of 7 shared benchmarks

Choose Phi 4 Mini if…

  • you want the most recent training data — it shipped Feb 2025
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Performance Benchmarks

Comparative analysis across standard metrics

7 benchmarks

Jamba 1.5 Mini outperforms in 4 benchmarks (ARC-C, Arena Hard, GPQA, MMLU), while Phi 4 Mini is better at 3 benchmarks (GSM8k, MMLU-Pro, TruthfulQA).

Jamba 1.5 Mini has a slight edge in benchmark performance.

Mon Jun 15 2026 • llm-stats.com

Arena Performance

Human preference votes

Model Size

Parameter count comparison

48.2B diff

Jamba 1.5 Mini has 48.2B more parameters than Phi 4 Mini, making it 1254.2% larger.

AI21 Labs
Jamba 1.5 Mini
52.0Bparameters
Microsoft
Phi 4 Mini
3.8Bparameters
52.0B
Jamba 1.5 Mini
3.8B
Phi 4 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).

AI21 Labs
Jamba 1.5 Mini
Input256,144 tokens
Output256,144 tokens
Microsoft
Phi 4 Mini
Input- tokens
Output- tokens
Mon Jun 15 2026 • llm-stats.com

License

Usage and distribution terms

Jamba 1.5 Mini is licensed under Jamba Open Model License, while Phi 4 Mini uses MIT.

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

Phi 4 Mini

MIT

Open weights

Release Timeline

When each model was launched

Jamba 1.5 Mini was released on 2024-08-22, while Phi 4 Mini was released on 2025-02-01.

Phi 4 Mini is 5 months newer than Jamba 1.5 Mini.

Jamba 1.5 Mini

Aug 22, 2024

1.8 years ago

Phi 4 Mini

Feb 1, 2025

1.4 years ago

5mo newer

Knowledge Cutoff

When training data ends

Jamba 1.5 Mini has a knowledge cutoff of 2024-03-05, while Phi 4 Mini has a cutoff of 2024-06-01.

Phi 4 Mini has more recent training data (up to 2024-06-01), making it potentially better informed about events through that date compared to Jamba 1.5 Mini (2024-03-05).

Jamba 1.5 Mini

Mar 2024

Phi 4 Mini

Jun 2024

3 mo newer

Outputs Comparison

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Key Takeaways

AI21 Labs
Larger context window (256,144 tokens)
Higher ARC-C score (85.7% vs 83.7%)
Higher Arena Hard score (46.1% vs 32.8%)
Higher GPQA score (32.3% vs 25.2%)
Higher MMLU score (69.7% vs 67.3%)
Microsoft
Higher GSM8k score (88.6% vs 75.8%)
Higher MMLU-Pro score (52.8% vs 42.5%)
Higher TruthfulQA score (66.4% vs 54.1%)

Detailed Comparison

AI Model Comparison Table
Feature
AI21 Labs
Jamba 1.5 Mini
Microsoft
Phi 4 Mini

FAQ

Common questions about Jamba 1.5 Mini vs Phi 4 Mini.

Which is better, Jamba 1.5 Mini or Phi 4 Mini?

Jamba 1.5 Mini has a slight edge in benchmark performance. Jamba 1.5 Mini is made by AI21 Labs and Phi 4 Mini is made by Microsoft. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Jamba 1.5 Mini compare to Phi 4 Mini in benchmarks?

Jamba 1.5 Mini scores ARC-C: 85.7%, GSM8k: 75.8%, MMLU: 69.7%, TruthfulQA: 54.1%, Arena Hard: 46.1%. Phi 4 Mini scores GSM8k: 88.6%, ARC-C: 83.7%, BoolQ: 81.2%, OpenBookQA: 79.2%, PIQA: 77.6%.

What are the context window sizes for Jamba 1.5 Mini and Phi 4 Mini?

Jamba 1.5 Mini supports 256K tokens and Phi 4 Mini supports an unknown number of 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 Phi 4 Mini?

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

Who makes Jamba 1.5 Mini and Phi 4 Mini?

Jamba 1.5 Mini is developed by AI21 Labs and Phi 4 Mini is developed by Microsoft.

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