Model Comparison
Jamba 1.5 Large vs Qwen2.5 14B InstructWhich is better in 2026?
Qwen2.5 14B Instruct shows notably better performance in the majority of benchmarks.
Verdict: Jamba 1.5 Large vs Qwen2.5 14B Instruct — which is better?
Jamba 1.5 Large (by AI21 Labs) and Qwen2.5 14B Instruct (by Alibaba Cloud / Qwen Team) 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 Large outperforms in 2 benchmarks (ARC-C, MMLU), while Qwen2.5 14B Instruct is better at 4 benchmarks (GPQA, GSM8k, MMLU-Pro, TruthfulQA). Qwen2.5 14B Instruct shows notably better performance in the majority of benchmarks.
Choose Jamba 1.5 Large if…
- you want predictable pricing at $2.00/M input and $8.00/M output
Choose Qwen2.5 14B Instruct if…
- you want the strongest raw capability — it leads on 4 of 6 shared benchmarks
- you want the most recent training data — it shipped Sep 2024
Performance Benchmarks
Comparative analysis across standard metrics
Jamba 1.5 Large outperforms in 2 benchmarks (ARC-C, MMLU), while Qwen2.5 14B Instruct is better at 4 benchmarks (GPQA, GSM8k, MMLU-Pro, TruthfulQA).
Qwen2.5 14B Instruct shows notably better performance in the majority of benchmarks.
Arena Performance
Human preference votes
Model Size
Parameter count comparison
Jamba 1.5 Large has 383.3B more parameters than Qwen2.5 14B Instruct, making it 2607.5% larger.
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).
License
Usage and distribution terms
Jamba 1.5 Large is licensed under Jamba Open Model License, while Qwen2.5 14B Instruct uses Apache 2.0.
License differences may affect how you can use these models in commercial or open-source projects.
Jamba Open Model License
Open weights
Apache 2.0
Open weights
Release Timeline
When each model was launched
Jamba 1.5 Large was released on 2024-08-22, while Qwen2.5 14B Instruct was released on 2024-09-19.
Qwen2.5 14B Instruct is 1 month newer than Jamba 1.5 Large.
Aug 22, 2024
1.9 years ago
Sep 19, 2024
1.8 years ago
4w newerKnowledge Cutoff
When training data ends
Jamba 1.5 Large has a documented knowledge cutoff of 2024-03-05, while Qwen2.5 14B Instruct'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 Qwen2.5 14B Instruct's cutoff date.
Mar 2024
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Outputs Comparison
Key Takeaways
Jamba 1.5 Large
View detailsAI21 Labs
Qwen2.5 14B Instruct
View detailsAlibaba Cloud / Qwen Team
Detailed Comparison
Interactive Arena
Judge for yourself.
Run your own prompts against Jamba 1.5 Large and Qwen2.5 14B Instruct side-by-side, then vote on the output you prefer.
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FAQ
Common questions about Jamba 1.5 Large vs Qwen2.5 14B Instruct.