Model Comparison

Grok-4 vs Jamba 1.5 Large

Grok-4 significantly outperforms across most benchmarks. Jamba 1.5 Large is 1.7x cheaper per token.

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Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

Grok-4 outperforms in 1 benchmarks (GPQA), while Jamba 1.5 Large is better at 0 benchmarks.

Grok-4 significantly outperforms across most benchmarks.

Fri Apr 17 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Jamba 1.5 Large costs less

For input processing, Grok-4 ($3.00/1M tokens) is 1.5x more expensive than Jamba 1.5 Large ($2.00/1M tokens).

For output processing, Grok-4 ($15.00/1M tokens) is 1.9x more expensive than Jamba 1.5 Large ($8.00/1M tokens).

In conclusion, Grok-4 is more expensive than Jamba 1.5 Large.*

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

Lowest available price from all providers
Fri Apr 17 2026 • llm-stats.com
xAI
Grok-4
Input tokens$3.00
Output tokens$15.00
Best providerxAI
AI21 Labs
Jamba 1.5 Large
Input tokens$2.00
Output tokens$8.00
Best providerAWS Bedrock
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Both models have the same input context window of 256,000 tokens. Jamba 1.5 Large can generate longer responses up to 256,000 tokens, while Grok-4 is limited to 8,000 tokens.

xAI
Grok-4
Input256,000 tokens
Output8,000 tokens
AI21 Labs
Jamba 1.5 Large
Input256,000 tokens
Output256,000 tokens
Fri Apr 17 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Grok-4 supports multimodal inputs, whereas Jamba 1.5 Large does not.

Grok-4 can handle both text and other forms of data like images, making it suitable for multimodal applications.

Grok-4

Text
Images
Audio
Video

Jamba 1.5 Large

Text
Images
Audio
Video

License

Usage and distribution terms

Grok-4 is licensed under a proprietary license, while Jamba 1.5 Large uses Jamba Open Model License.

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

Grok-4

Proprietary

Closed source

Jamba 1.5 Large

Jamba Open Model License

Open weights

Release Timeline

When each model was launched

Grok-4 was released on 2025-07-09, while Jamba 1.5 Large was released on 2024-08-22.

Grok-4 is 11 months newer than Jamba 1.5 Large.

Grok-4

Jul 9, 2025

9 months ago

10mo newer
Jamba 1.5 Large

Aug 22, 2024

1.7 years ago

Knowledge Cutoff

When training data ends

Grok-4 has a knowledge cutoff of 2024-12-31, while Jamba 1.5 Large has a cutoff of 2024-03-05.

Grok-4 has more recent training data (up to 2024-12-31), making it potentially better informed about events through that date compared to Jamba 1.5 Large (2024-03-05).

Grok-4

Dec 2024

9 mo newer
Jamba 1.5 Large

Mar 2024

Provider Availability

Grok-4 is available from xAI. Jamba 1.5 Large is available from Bedrock, Google.

Grok-4

xai logo
xAI
Input Price:Input: $3.00/1MOutput Price:Output: $15.00/1M

Jamba 1.5 Large

bedrock logo
AWS Bedrock
Input Price:Input: $2.00/1MOutput Price:Output: $8.00/1M
google logo
Google
Input Price:Input: $2.00/1MOutput Price:Output: $8.00/1M
* Prices shown are per million tokens

Outputs Comparison

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Key Takeaways

xAI
Supports multimodal inputs
Higher GPQA score (87.5% vs 36.9%)
AI21 Labs
Less expensive input tokens
Less expensive output tokens
Has open weights
xAIGrok-4
AI21 LabsJamba 1.5 Large
Compare in Playground

Detailed Comparison

AI Model Comparison Table
Feature
xAI
Grok-4
AI21 Labs
Jamba 1.5 Large

FAQ

Common questions about Grok-4 vs Jamba 1.5 Large

Grok-4 significantly outperforms across most benchmarks. Grok-4 is made by xAI and Jamba 1.5 Large is made by AI21 Labs. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.
Grok-4 scores AIME 2025: 91.7%, HMMT25: 90.0%, GPQA: 87.5%, LiveCodeBench: 79.0%, Humanity's Last Exam: 40.0%. Jamba 1.5 Large scores ARC-C: 93.0%, GSM8k: 87.0%, MMLU: 81.2%, Arena Hard: 65.4%, TruthfulQA: 58.3%.
Jamba 1.5 Large is 1.5x cheaper for input tokens. Grok-4 costs $3.00/M input and $15.00/M output via xai. Jamba 1.5 Large costs $2.00/M input and $8.00/M output via bedrock.
Grok-4 supports 256K tokens and Jamba 1.5 Large supports 256K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.
Key differences include input pricing ($3.00 vs $2.00/M), multimodal support (yes vs no), licensing (Proprietary vs Jamba Open Model License). See the full comparison above for benchmark-by-benchmark results.
Grok-4 is developed by xAI and Jamba 1.5 Large is developed by AI21 Labs.