Jamba 1.5 MinivsClaude Opus 4
AI21 Labs vs Anthropic — Side-by-side model comparison
Head-to-Head Comparison
| Metric | Jamba 1.5 Mini | Claude Opus 4 |
|---|---|---|
| Provider | ||
| Arena Rank | — | #1 |
| Context Window | 256K | 200K |
| Input Pricing | $0.20/1M tokens | $5.00/1M tokens |
| Output Pricing | $0.40/1M tokens | $25.00/1M tokens |
| Parameters | 52B (12B active) | Undisclosed |
| Open Source | Yes | No |
| Best For | Cost-effective long-context, summarization | Complex reasoning, coding, agentic tasks |
| Release Date | Aug 22, 2024 | May 22, 2025 |
Jamba 1.5 Mini
Jamba 1.5 Mini, developed by AI21 Labs, is a compact hybrid SSM-Transformer model with 52 billion total parameters (12 billion active) and a 256K token context window. The model applies AI21 Labs' hybrid Mamba-Transformer architecture in a smaller, more efficient package designed for cost-effective long-context processing. It handles summarization, document analysis, and RAG tasks with the efficiency advantages of state-space models on long sequences. Priced at $0.20 per million input tokens and $0.40 per million output tokens, it offers affordable access to long-context processing. As an open-source model, Jamba 1.5 Mini can be deployed on more modest hardware compared to its larger sibling. The model targets production applications where processing long documents efficiently at low cost matters more than achieving maximum benchmark scores.
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 vs Claude Opus 4
Jamba 1.5 Mini is 50.0x cheaper on average, making it the better choice for high-volume applications.
Jamba 1.5 Mini supports a larger context window (256K), allowing it to process longer documents in a single request.
Jamba 1.5 Mini 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
- +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 cost-effective long-context, summarization
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 is 50.0x more affordable than Claude Opus 4. For a typical enterprise workload processing 100M tokens per month:
Jamba 1.5 Mini 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 wins our head-to-head comparison with 4 out of 5 category wins. It's the stronger choice for cost-effective long-context, summarization, though Claude Opus 4 holds an edge in complex reasoning, coding, agentic tasks.
Last compared: April 2026 · Data sourced from public benchmarks and official pricing pages