Grok-4.1 Fast Non-Reasoning vs Jamba 1.5 Mini
Comparing Grok-4.1 Fast Non-Reasoning and Jamba 1.5 Mini across benchmarks, pricing, and capabilities.
xAI · AI21 Labs · Updated for 2026
Which is better?
Grok-4.1 Fast Non-Reasoning and Jamba 1.5 Mini trade strengths across price, capabilities, and technical limits. The better choice depends on the workload.
On price, Jamba 1.5 Mini is roughly 1.1x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Grok-4.1 Fast Non-Reasoning also accepts a larger context window (2,000,000 input tokens), making it the stronger choice for long documents and large codebases.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose Grok-4.1 Fast Non-Reasoning
- you process long inputs — it offers a 2,000,000 token context window
- you want the most recent training data — it shipped Nov 2025
Choose Jamba 1.5 Mini
- cost matters — it's about 1.1x cheaper per token
- you need open weights you can self-host or fine-tune
At a glance
The differences that matter most.
Individual benchmarks
0 reported for Grok-4.1 Fast Non-Reasoning · 8 for Jamba 1.5 Mini
Grok-4.1 Fast Non-Reasoning and Jamba 1.5 Minidon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.
Human preference
Blind head-to-head votes and playground preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, Grok-4.1 Fast Non-Reasoning ($0.20/1M tokens) costs the same as Jamba 1.5 Mini ($0.20/1M tokens).
For output processing, Grok-4.1 Fast Non-Reasoning ($0.50/1M tokens) is 1.3x more expensive than Jamba 1.5 Mini ($0.40/1M tokens).
In conclusion, Grok-4.1 Fast Non-Reasoning is more expensive than Jamba 1.5 Mini.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Grok-4.1 Fast Non-Reasoning accepts 2,000,000 input tokens compared to Jamba 1.5 Mini's 256,144 tokens. Jamba 1.5 Mini can generate longer responses up to 256,144 tokens, while Grok-4.1 Fast Non-Reasoning is limited to 30,000 tokens.
Input capabilities
Documented input modalities across available providers
Grok-4.1 Fast Non-Reasoning supports multimodal inputs, whereas Jamba 1.5 Mini does not.
Grok-4.1 Fast Non-Reasoning can handle both text and other forms of data like images, making it suitable for multimodal applications.
Grok-4.1 Fast Non-Reasoning
Jamba 1.5 Mini
License
Usage and distribution terms
Grok-4.1 Fast Non-Reasoning 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.
Proprietary
Closed source
Jamba Open Model License
Open weights
Release Timeline
When each model was launched
Grok-4.1 Fast Non-Reasoning was released on 2025-11-17, while Jamba 1.5 Mini was released on 2024-08-22.
Grok-4.1 Fast Non-Reasoning is 15 months newer than Jamba 1.5 Mini.
Nov 17, 2025
10 months ago
1.2yr newerAug 22, 2024
2.1 years ago
Knowledge Cutoff
When training data ends
Jamba 1.5 Mini has a documented knowledge cutoff of 2024-03-05, while Grok-4.1 Fast Non-Reasoning's cutoff date is not specified.
We can confirm Jamba 1.5 Mini's training data extends to 2024-03-05, but cannot make a direct comparison without Grok-4.1 Fast Non-Reasoning's cutoff date.
—
Mar 2024
Provider Availability
Grok-4.1 Fast Non-Reasoning is available from xAI. Jamba 1.5 Mini is available from Bedrock, Google.
Grok-4.1 Fast Non-Reasoning
Jamba 1.5 Mini
Outputs Comparison
Judge for yourself.
Run your own prompts against Grok-4.1 Fast Non-Reasoning and Jamba 1.5 Mini side-by-side, then vote on the output you prefer.
FAQ
Common questions about Grok-4.1 Fast Non-Reasoning vs Jamba 1.5 Mini.