Model Comparison

GPT-4.1 vs Jamba 1.5 MiniWhich is better in 2026?

GPT-4.1 significantly outperforms across most benchmarks. Jamba 1.5 Mini is 14.0x cheaper per token.

Verdict: GPT-4.1 vs Jamba 1.5 Mini — which is better?

GPT-4.1 (by OpenAI) 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.

GPT-4.1 outperforms in 2 benchmarks (GPQA, MMLU), while Jamba 1.5 Mini is better at 0 benchmarks. GPT-4.1 significantly outperforms across most benchmarks.

On price, Jamba 1.5 Mini is roughly 14.0x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

GPT-4.1 also accepts a larger context window (1,047,576 input tokens), making it the stronger choice for long documents and large codebases.

Choose GPT-4.1 if…

  • you want the strongest raw capability — it leads on 2 of 2 shared benchmarks
  • you process long inputs — it offers a 1,047,576 token context window
  • you want the most recent training data — it shipped Apr 2025

Choose Jamba 1.5 Mini if…

  • cost matters — it's about 14.0x cheaper per token
  • you need open weights you can self-host or fine-tune

Performance Benchmarks

Comparative analysis across standard metrics

2 benchmarks

GPT-4.1 outperforms in 2 benchmarks (GPQA, MMLU), while Jamba 1.5 Mini is better at 0 benchmarks.

GPT-4.1 significantly outperforms across most benchmarks.

Sat Jul 18 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, GPT-4.1 ($2.00/1M tokens) is 10.0x more expensive than Jamba 1.5 Mini ($0.20/1M tokens).

For output processing, GPT-4.1 ($8.00/1M tokens) is 20.0x more expensive than Jamba 1.5 Mini ($0.40/1M tokens).

In conclusion, GPT-4.1 is more expensive than Jamba 1.5 Mini.*

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

Lowest available price from all providers
Sat Jul 18 2026 • llm-stats.com
OpenAI
GPT-4.1
Input tokens$2.00
Output tokens$8.00
Best providerOpenAI
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

GPT-4.1 accepts 1,047,576 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 GPT-4.1 is limited to 32,768 tokens.

OpenAI
GPT-4.1
Input1,047,576 tokens
Output32,768 tokens
AI21 Labs
Jamba 1.5 Mini
Input256,144 tokens
Output256,144 tokens
Sat Jul 18 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

GPT-4.1 supports multimodal inputs, whereas Jamba 1.5 Mini does not.

GPT-4.1 can handle both text and other forms of data like images, making it suitable for multimodal applications.

GPT-4.1

Text
Images
Audio
Video

Jamba 1.5 Mini

Text
Images
Audio
Video

License

Usage and distribution terms

GPT-4.1 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.

GPT-4.1

Proprietary

Closed source

Jamba 1.5 Mini

Jamba Open Model License

Open weights

Release Timeline

When each model was launched

GPT-4.1 was released on 2025-04-14, while Jamba 1.5 Mini was released on 2024-08-22.

GPT-4.1 is 8 months newer than Jamba 1.5 Mini.

GPT-4.1

Apr 14, 2025

1.3 years ago

7mo newer
Jamba 1.5 Mini

Aug 22, 2024

1.9 years ago

Knowledge Cutoff

When training data ends

GPT-4.1 has a knowledge cutoff of 2024-06-01, while Jamba 1.5 Mini has a cutoff of 2024-03-05.

GPT-4.1 has more recent training data (up to 2024-06-01), making it potentially better informed about events through that date compared to Jamba 1.5 Mini (2024-03-05).

GPT-4.1

Jun 2024

3 mo newer
Jamba 1.5 Mini

Mar 2024

Provider Availability

GPT-4.1 is available from OpenAI. Jamba 1.5 Mini is available from Bedrock, Google.

GPT-4.1

openai logo
OpenAI
Input Price:Input: $2.00/1MOutput Price:Output: $8.00/1M

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

OpenAI
Larger context window (1,047,576 tokens)
Supports multimodal inputs
Higher GPQA score (66.3% vs 32.3%)
Higher MMLU score (90.2% vs 69.7%)
AI21 Labs
Less expensive input tokens
Less expensive output tokens
Has open weights
OpenAIGPT-4.1
AI21 LabsJamba 1.5 Mini
Compare in Playground

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against GPT-4.1 and Jamba 1.5 Mini side-by-side, then vote on the output you prefer.

GPT-4.1
✓ Preferred
Jamba 1.5 Mini
Open in Playground
AI Model Comparison Table
Feature
OpenAI
GPT-4.1
AI21 Labs
Jamba 1.5 Mini

FAQ

Common questions about GPT-4.1 vs Jamba 1.5 Mini.

Which is better, GPT-4.1 or Jamba 1.5 Mini?

GPT-4.1 significantly outperforms across most benchmarks. GPT-4.1 is made by OpenAI 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 GPT-4.1 compare to Jamba 1.5 Mini in benchmarks?

GPT-4.1 scores MMLU: 90.2%, CharXiv-D: 87.9%, IFEval: 87.4%, MMMLU: 87.3%, MMMU: 74.8%. Jamba 1.5 Mini scores ARC-C: 85.7%, GSM8k: 75.8%, MMLU: 69.7%, TruthfulQA: 54.1%, Arena Hard: 46.1%.

Is GPT-4.1 cheaper than Jamba 1.5 Mini?

Jamba 1.5 Mini is 10.0x cheaper for input tokens. GPT-4.1 costs $2.00/M input and $8.00/M output via openai. Jamba 1.5 Mini costs $0.20/M input and $0.40/M output via bedrock.

What are the context window sizes for GPT-4.1 and Jamba 1.5 Mini?

GPT-4.1 supports 1.0M 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 GPT-4.1 and Jamba 1.5 Mini?

Key differences include context window (1.0M 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 GPT-4.1 and Jamba 1.5 Mini?

GPT-4.1 is developed by OpenAI and Jamba 1.5 Mini is developed by AI21 Labs.

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