AI21 Jamba2 vs Google Antigravity

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

Our Pick

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

Google Antigravity

A
8.0/10

Google's agent-first AI IDE -- deploys up to 5 autonomous coding agents in parallel on a VS Code fork

Powered by Gemini 3.1 Pro / Claude Opus 4.6 / GPT-OSS 120B (multi-model)

CategoryAI21 Jamba2Google Antigravity
Ease of Use6.58.0
Output Quality8.08.5
Value9.06.0
Features8.59.5
Overall8.08.0

Pricing Comparison

FeatureAI21 Jamba2Google Antigravity
Free TierYesYes
Starting Price$0$0

Which Should You Pick?

Pick AI21 Jamba2 if...

  • ✓Better value for money (9/10)

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 Google Antigravity if...

  • ✓Easier to use (8 vs 6.5)
  • ✓More features (9.5 vs 8.5)

Developers working on large, multi-file projects who want to parallelize their workflow. If you regularly work on 3-5 tasks simultaneously (fix a bug, add a feature, write tests, refactor), Antigravity's multi-agent architecture is unmatched.

Visit Google Antigravity

Our Verdict

AI21 Jamba2 and Google Antigravity are extremely close overall. Your choice comes down to specific needs -- AI21 Jamba2 is better for 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, while Google Antigravity works best for developers working on large, multi-file projects who want to parallelize their workflow.