AI21 Jamba2 vs Qwen (Alibaba)

Which one should you pick? Here's the full breakdown.

AI21 Jamba2

A
8.0/10

AI21 Labs' hybrid SSM-Transformer (Mamba-style) open-weight family -- Jamba2 launched 2026-01-08. Two sizes: 3B dense (runs on phones / laptops) and Jamba2 Mini MoE (12B active / 52B total). Apache 2.0, 256K context, mid-trained on 500B tokens

Our Pick

Qwen (Alibaba)

A
8.8/10

Alibaba's open-weights + API family -- Qwen 3.6-Plus (Mar 30 2026, 1M context + always-on CoT + agentic tool-use), Qwen3.5 Small (2B runs on iPhone, 9B matches 120B-class models), plus Qwen3.5-Omni native multimodal. Apache 2.0 on the open sizes

CategoryAI21 Jamba2Qwen (Alibaba)
Ease of Use6.57.0
Output Quality8.09.0
Value9.010.0
Features8.59.0
Overall8.08.8

Pricing Comparison

FeatureAI21 Jamba2Qwen (Alibaba)
Free TierYesYes
Starting Price$0$0

Benchmark Head-to-Head

Qwen3.5-397B MoE benchmarks — AI21 Jamba2 has no published benchmarks

BenchmarkScore
MMLU-Pro83.5%
GPQA Diamond78.2%
AIME 202587%
HumanEval92.5%
SWE-Bench Verified69.4%

Which Should You Pick?

Pick AI21 Jamba2 if...

Developers building long-context RAG systems (256K context with manageable memory is the sweet spot), mobile/edge deployments where Jamba2 3B's hybrid efficiency shines, and teams that want to experiment with non-transformer architectures while staying in Apache-2.0 territory. Also good for Israeli + EU enterprise procurement where AI21's geography / GDPR posture matters.

Visit AI21 Jamba2

Pick Qwen (Alibaba) if...

  • ✓Higher output quality (9 vs 8)
  • ✓Better value for money (10/10)

Developers who want frontier-tier open weights with Apache 2.0 licensing. Qwen3-Coder-Next is arguably the best local coding model; Qwen3.5-397B is a top-3 open generalist.

Visit Qwen (Alibaba)

Our Verdict

Qwen (Alibaba) edges out AI21 Jamba2 with a 8.8 vs 8.0 overall score. Both are solid picks, but Qwen (Alibaba) has the advantage in output quality.