Model Comparison

Grok 4.5 vs Jamba 1.5 MiniWhich is better in 2026?

Grok 4.5 significantly outperforms across most benchmarks. Jamba 1.5 Mini is 12.0x cheaper per token.

Verdict: Grok 4.5 vs Jamba 1.5 Mini — which is better?

Grok 4.5 (by xAI) and Jamba 1.5 Mini (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.

Grok 4.5 outperforms in 1 benchmarks (GPQA), while Jamba 1.5 Mini is better at 0 benchmarks. Grok 4.5 significantly outperforms across most benchmarks.

On price, Jamba 1.5 Mini is roughly 12.0x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Grok 4.5 also accepts a larger context window (500,000 input tokens), making it the stronger choice for long documents and large codebases.

Choose Grok 4.5 if…

  • you want the strongest raw capability — it leads on 1 of 1 shared benchmarks
  • you process long inputs — it offers a 500,000 token context window
  • you want the most recent training data — it shipped Jul 2026

Choose Jamba 1.5 Mini if…

  • cost matters — it's about 12.0x cheaper per token
  • you need open weights you can self-host or fine-tune

Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

Grok 4.5 outperforms in 1 benchmarks (GPQA), while Jamba 1.5 Mini is better at 0 benchmarks.

Grok 4.5 significantly outperforms across most benchmarks.

Sun Jul 19 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Jamba 1.5 Mini costs less

For input processing, Grok 4.5 ($2.00/1M tokens) is 10.0x more expensive than Jamba 1.5 Mini ($0.20/1M tokens).

For output processing, Grok 4.5 ($6.00/1M tokens) is 15.0x more expensive than Jamba 1.5 Mini ($0.40/1M tokens).

In conclusion, Grok 4.5 is more expensive than Jamba 1.5 Mini.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Sun Jul 19 2026 • llm-stats.com
xAI
Grok 4.5
Input tokens$2.00
Output tokens$6.00
Best providerxAI
AI21 Labs
Jamba 1.5 Mini
Input tokens$0.20
Output tokens$0.40
Best providerAWS Bedrock
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Grok 4.5 accepts 500,000 input tokens compared to Jamba 1.5 Mini's 256,144 tokens. Only Jamba 1.5 Mini specifies output context (256,144 tokens).

xAI
Grok 4.5
Input500,000 tokens
Output- tokens
AI21 Labs
Jamba 1.5 Mini
Input256,144 tokens
Output256,144 tokens
Sun Jul 19 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Grok 4.5 supports multimodal inputs, whereas Jamba 1.5 Mini does not.

Grok 4.5 can handle both text and other forms of data like images, making it suitable for multimodal applications.

Grok 4.5

Text
Images
Audio
Video

Jamba 1.5 Mini

Text
Images
Audio
Video

License

Usage and distribution terms

Grok 4.5 is licensed under a proprietary license, while Jamba 1.5 Mini uses Jamba Open Model License.

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

Grok 4.5

Proprietary

Closed source

Jamba 1.5 Mini

Jamba Open Model License

Open weights

Release Timeline

When each model was launched

Grok 4.5 was released on 2026-07-16, while Jamba 1.5 Mini was released on 2024-08-22.

Grok 4.5 is 23 months newer than Jamba 1.5 Mini.

Grok 4.5

Jul 16, 2026

3 days ago

1.9yr newer
Jamba 1.5 Mini

Aug 22, 2024

1.9 years ago

Knowledge Cutoff

When training data ends

Grok 4.5 has a knowledge cutoff of 2026-02-01, while Jamba 1.5 Mini has a cutoff of 2024-03-05.

Grok 4.5 has more recent training data (up to 2026-02-01), making it potentially better informed about events through that date compared to Jamba 1.5 Mini (2024-03-05).

Grok 4.5

Feb 2026

1.9 yr newer
Jamba 1.5 Mini

Mar 2024

Provider Availability

Grok 4.5 is available from xAI. Jamba 1.5 Mini is available from Bedrock, Google.

Grok 4.5

xai logo
xAI
Input Price:Input: $2.00/1MOutput Price:Output: $6.00/1M

Jamba 1.5 Mini

bedrock logo
AWS Bedrock
Input Price:Input: $0.20/1MOutput Price:Output: $0.40/1M
google logo
Google
Input Price:Input: $0.20/1MOutput Price:Output: $0.40/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

xAI
Larger context window (500,000 tokens)
Supports multimodal inputs
Higher GPQA score (93.0% vs 32.3%)
AI21 Labs
Less expensive input tokens
Less expensive output tokens
Has open weights

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Grok 4.5 and Jamba 1.5 Mini side-by-side, then vote on the output you prefer.

Grok 4.5
✓ Preferred
Jamba 1.5 Mini
Open in Playground
AI Model Comparison Table
Feature
xAI
Grok 4.5
AI21 Labs
Jamba 1.5 Mini

FAQ

Common questions about Grok 4.5 vs Jamba 1.5 Mini.

Which is better, Grok 4.5 or Jamba 1.5 Mini?

Grok 4.5 significantly outperforms across most benchmarks. Grok 4.5 is made by xAI and Jamba 1.5 Mini is made by AI21 Labs. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Grok 4.5 compare to Jamba 1.5 Mini in benchmarks?

Grok 4.5 scores GPQA: 93.0%, Terminal-Bench 2.1: 83.3%, Artificial Analysis Coding Agent Index v1.1: 76.0%, SWE-Bench Pro: 64.7%, AA-Omniscience Index: 63.0%. Jamba 1.5 Mini scores ARC-C: 85.7%, GSM8k: 75.8%, MMLU: 69.7%, TruthfulQA: 54.1%, Arena Hard: 46.1%.

Is Grok 4.5 cheaper than Jamba 1.5 Mini?

Jamba 1.5 Mini is 10.0x cheaper for input tokens. Grok 4.5 costs $2.00/M input and $6.00/M output via xai. Jamba 1.5 Mini costs $0.20/M input and $0.40/M output via bedrock.

What are the context window sizes for Grok 4.5 and Jamba 1.5 Mini?

Grok 4.5 supports 500K tokens and Jamba 1.5 Mini 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 Grok 4.5 and Jamba 1.5 Mini?

Key differences include context window (500K vs 256K), input pricing ($2.00 vs $0.20/M), multimodal support (yes vs no), licensing (Proprietary vs Jamba Open Model License). See the full comparison above for benchmark-by-benchmark results.

Who makes Grok 4.5 and Jamba 1.5 Mini?

Grok 4.5 is developed by xAI and Jamba 1.5 Mini is developed by AI21 Labs.

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