Jamba 1.5 Mini (SSM)vsClaude Opus 4
AI21 Labs vs Anthropic — Side-by-side model comparison
Head-to-Head Comparison
| Metric | Jamba 1.5 Mini (SSM) | Claude Opus 4 |
|---|---|---|
| Provider | ||
| Arena Rank | — | #1 |
| Context Window | 256K | 200K |
| Input Pricing | /bin/zsh.20/1M tokens | $5.00/1M tokens |
| Output Pricing | /bin/zsh.40/1M tokens | $25.00/1M tokens |
| Parameters | 52B (12B active) | Undisclosed |
| Open Source | Yes | No |
| Best For | Efficient long-context processing, throughput | Complex reasoning, coding, agentic tasks |
| Release Date | Mar 28, 2024 | May 22, 2025 |
Jamba 1.5 Mini (SSM)
Jamba is AI21 Labs' pioneering hybrid architecture that combines Mamba state-space model layers with transformer attention layers. This novel approach achieves 3x throughput improvement over pure transformer models of equivalent quality. The Jamba architecture represents a significant step toward more efficient AI models that can process long contexts without the quadratic cost of full attention.
View AI21 Labs profile →Claude Opus 4
Claude Opus 4 is Anthropic's most powerful AI model, holding the #1 position on the Chatbot Arena leaderboard. It represents a breakthrough in extended thinking and agentic capabilities, able to work autonomously on complex multi-step tasks for hours. With a 200K token context window, it excels at analyzing entire codebases, lengthy legal documents, and research papers in a single pass. The model demonstrates exceptional performance in coding (setting new benchmarks on SWE-bench), advanced reasoning, and nuanced writing tasks. Its agentic capabilities allow it to use tools, navigate computers, and execute multi-step workflows with minimal human oversight. Opus 4 is the preferred choice for enterprises requiring the highest quality output on mission-critical tasks where accuracy and depth matter more than speed or cost.
View Anthropic profile →Key Differences: Jamba 1.5 Mini (SSM) vs Claude Opus 4
Jamba 1.5 Mini (SSM) is 50.0x cheaper on average, making it the better choice for high-volume applications.
Jamba 1.5 Mini (SSM) supports a larger context window (256K), allowing it to process longer documents in a single request.
Jamba 1.5 Mini (SSM) is open-source (free to self-host and fine-tune) while Claude Opus 4 is proprietary (API-only access).
When to use Jamba 1.5 Mini (SSM)
- +Budget is a concern and you need cost efficiency
- +You need to process long documents (256K context)
- +You need to self-host or fine-tune the model
- +Your use case involves efficient long-context processing, throughput
When to use Claude Opus 4
- +Quality matters more than cost
- +You prefer a managed API without infrastructure overhead
- +Your use case involves complex reasoning, coding, agentic tasks
Cost Analysis
At current pricing, Jamba 1.5 Mini (SSM) is 50.0x more affordable than Claude Opus 4. For a typical enterprise workload processing 100M tokens per month:
Jamba 1.5 Mini (SSM) monthly cost
$30
100M tokens/mo (50/50 in/out)
Claude Opus 4 monthly cost
$1,500
100M tokens/mo (50/50 in/out)
The Verdict
Jamba 1.5 Mini (SSM) wins our head-to-head comparison with 4 out of 5 category wins. It's the stronger choice for efficient long-context processing, throughput, though Claude Opus 4 holds an edge in complex reasoning, coding, agentic tasks.
Last compared: March 2026 · Data sourced from public benchmarks and official pricing pages