Reka CorevsClaude Opus 4
Reka AI vs Anthropic — Side-by-side model comparison
Head-to-Head Comparison
| Metric | Reka Core | Claude Opus 4 |
|---|---|---|
| Provider | ||
| Arena Rank | #17 | #1 |
| Context Window | 128K | 200K |
| Input Pricing | $2.00/1M tokens | $5.00/1M tokens |
| Output Pricing | $2.00/1M tokens | $25.00/1M tokens |
| Parameters | 67B | Undisclosed |
| Open Source | No | No |
| Best For | Multimodal reasoning, video understanding, multilingual | Complex reasoning, coding, agentic tasks |
| Release Date | Apr 15, 2024 | May 22, 2025 |
Reka Core
Reka Core, developed by Reka AI, is a multimodal model that natively processes text, images, video, and audio inputs in a unified architecture. Founded by former Google DeepMind researchers who helped build Google's Gemini, Reka AI brings deep expertise in multimodal training to this flagship model. Reka Core demonstrates competitive performance against larger models on general reasoning and multimodal understanding benchmarks. Its ability to process video and audio natively, rather than through separate encoder pipelines, enables more coherent cross-modal understanding. The model targets enterprise applications requiring versatile multimodal AI, including document analysis with embedded media, video understanding, and audio-visual content processing. Reka AI has positioned Reka Core as a practical alternative for organizations seeking multimodal capabilities without dependence on the largest AI providers.
View Reka AI 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: Reka Core vs Claude Opus 4
Claude Opus 4 ranks higher in arena benchmarks (#1) indicating stronger overall performance.
Reka Core is 7.5x cheaper on average, making it the better choice for high-volume applications.
Claude Opus 4 supports a larger context window (200K), allowing it to process longer documents in a single request.
When to use Reka Core
- +Budget is a concern and you need cost efficiency
- +Your use case involves multimodal reasoning, video understanding, multilingual
When to use Claude Opus 4
- +You need the highest quality output based on arena rankings
- +Quality matters more than cost
- +You need to process long documents (200K context)
- +Your use case involves complex reasoning, coding, agentic tasks
Cost Analysis
At current pricing, Reka Core is 7.5x more affordable than Claude Opus 4. For a typical enterprise workload processing 100M tokens per month:
Reka Core monthly cost
$200
100M tokens/mo (50/50 in/out)
Claude Opus 4 monthly cost
$1,500
100M tokens/mo (50/50 in/out)
The Verdict
Reka Core wins our head-to-head comparison with 3 out of 5 category wins. It's the stronger choice for multimodal reasoning, video understanding, multilingual, 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