Model Comparison

Claude Opus 4.5 vs Jamba 1.5 LargeWhich is better in 2026?

Claude Opus 4.5 significantly outperforms across most benchmarks. Jamba 1.5 Large is 2.9x cheaper per token.

Verdict: Claude Opus 4.5 vs Jamba 1.5 Large — which is better?

Claude Opus 4.5 (by Anthropic) and Jamba 1.5 Large (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.

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

On price, Jamba 1.5 Large is roughly 2.9x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Jamba 1.5 Large also accepts a larger context window (256,000 input tokens), making it the stronger choice for long documents and large codebases.

Choose Claude Opus 4.5 if…

  • you want the strongest raw capability — it leads on 1 of 1 shared benchmarks
  • you want the most recent training data — it shipped Nov 2025

Choose Jamba 1.5 Large if…

  • cost matters — it's about 2.9x cheaper per token
  • you process long inputs — it offers a 256,000 token context window
  • you need open weights you can self-host or fine-tune
Want to compare interactively?Try the playground

Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

Claude Opus 4.5 outperforms in 1 benchmarks (GPQA), while Jamba 1.5 Large is better at 0 benchmarks.

Claude Opus 4.5 significantly outperforms across most benchmarks.

Sat Jun 06 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, Claude Opus 4.5 ($5.00/1M tokens) is 2.5x more expensive than Jamba 1.5 Large ($2.00/1M tokens).

For output processing, Claude Opus 4.5 ($25.00/1M tokens) is 3.1x more expensive than Jamba 1.5 Large ($8.00/1M tokens).

In conclusion, Claude Opus 4.5 is more expensive than Jamba 1.5 Large.*

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

Lowest available price from all providers
Sat Jun 06 2026 • llm-stats.com
Anthropic
Claude Opus 4.5
Input tokens$5.00
Output tokens$25.00
Best providerAnthropic
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

Jamba 1.5 Large accepts 256,000 input tokens compared to Claude Opus 4.5's 200,000 tokens. Jamba 1.5 Large can generate longer responses up to 256,000 tokens, while Claude Opus 4.5 is limited to 64,000 tokens.

Anthropic
Claude Opus 4.5
Input200,000 tokens
Output64,000 tokens
AI21 Labs
Jamba 1.5 Large
Input256,000 tokens
Output256,000 tokens
Sat Jun 06 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Claude Opus 4.5 supports multimodal inputs, whereas Jamba 1.5 Large does not.

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

Claude Opus 4.5

Text
Images
Audio
Video

Jamba 1.5 Large

Text
Images
Audio
Video

License

Usage and distribution terms

Claude Opus 4.5 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.

Claude Opus 4.5

Proprietary

Closed source

Jamba 1.5 Large

Jamba Open Model License

Open weights

Release Timeline

When each model was launched

Claude Opus 4.5 was released on 2025-11-24, while Jamba 1.5 Large was released on 2024-08-22.

Claude Opus 4.5 is 15 months newer than Jamba 1.5 Large.

Claude Opus 4.5

Nov 24, 2025

6 months ago

1.3yr newer
Jamba 1.5 Large

Aug 22, 2024

1.8 years ago

Knowledge Cutoff

When training data ends

Claude Opus 4.5 has a knowledge cutoff of 2025-03-31, while Jamba 1.5 Large has a cutoff of 2024-03-05.

Claude Opus 4.5 has more recent training data (up to 2025-03-31), making it potentially better informed about events through that date compared to Jamba 1.5 Large (2024-03-05).

Claude Opus 4.5

Mar 2025

1 yr newer
Jamba 1.5 Large

Mar 2024

Provider Availability

Claude Opus 4.5 is available from Anthropic. Jamba 1.5 Large is available from Bedrock, Google.

Claude Opus 4.5

anthropic logo
Anthropic
Input Price:Input: $5.00/1MOutput Price:Output: $25.00/1M

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

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

Anthropic
Supports multimodal inputs
Higher GPQA score (87.0% vs 36.9%)
AI21 Labs
Larger context window (256,000 tokens)
Less expensive input tokens
Less expensive output tokens
Has open weights

Detailed Comparison

AI Model Comparison Table
Feature
Anthropic
Claude Opus 4.5
AI21 Labs
Jamba 1.5 Large

FAQ

Common questions about Claude Opus 4.5 vs Jamba 1.5 Large.

Which is better, Claude Opus 4.5 or Jamba 1.5 Large?

Claude Opus 4.5 significantly outperforms across most benchmarks. Claude Opus 4.5 is made by Anthropic 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.

How does Claude Opus 4.5 compare to Jamba 1.5 Large in benchmarks?

Claude Opus 4.5 scores Tau2 Telecom: 98.2%, MMMLU: 90.8%, Tau2 Retail: 88.9%, GPQA: 87.0%, SWE-Bench Verified: 80.9%. Jamba 1.5 Large scores ARC-C: 93.0%, GSM8k: 87.0%, MMLU: 81.2%, Arena Hard: 65.4%, TruthfulQA: 58.3%.

Is Claude Opus 4.5 cheaper than Jamba 1.5 Large?

Jamba 1.5 Large is 2.5x cheaper for input tokens. Claude Opus 4.5 costs $5.00/M input and $25.00/M output via anthropic. Jamba 1.5 Large costs $2.00/M input and $8.00/M output via bedrock.

What are the context window sizes for Claude Opus 4.5 and Jamba 1.5 Large?

Claude Opus 4.5 supports 200K 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.

What are the main differences between Claude Opus 4.5 and Jamba 1.5 Large?

Key differences include context window (200K vs 256K), input pricing ($5.00 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.

Who makes Claude Opus 4.5 and Jamba 1.5 Large?

Claude Opus 4.5 is developed by Anthropic and Jamba 1.5 Large is developed by AI21 Labs.

Related comparisons