Reka CorevsGPT-o3
Reka AI vs OpenAI — Side-by-side model comparison
Head-to-Head Comparison
| Metric | Reka Core | GPT-o3 |
|---|---|---|
| Provider | ||
| Arena Rank | — | #2 |
| Context Window | 128K | 200K |
| Input Pricing | $3.00/1M tokens | $2.00/1M tokens |
| Output Pricing | $15.00/1M tokens | $8.00/1M tokens |
| Parameters | Undisclosed | Undisclosed |
| Open Source | No | No |
| Best For | Multimodal reasoning, video understanding, analysis | Advanced reasoning, agentic tasks, research |
| Release Date | Apr 15, 2024 | Apr 16, 2025 |
Reka Core
Reka Core is Reka AI's flagship multimodal model capable of understanding text, images, video, and audio natively. Founded by former Google DeepMind researchers, Reka built one of the few models with true video understanding capabilities. Core delivers competitive performance with leading frontier models while offering unique multimodal input flexibility.
View Reka AI profile →GPT-o3
GPT-o3 is OpenAI's most advanced reasoning model, succeeding o1 as the frontier of deliberative AI. It uses an enhanced chain-of-thought approach where the model spends more compute time 'thinking' before responding, dramatically improving performance on complex STEM, mathematical, and logical reasoning tasks. With a 200K token context window and the ability to use tools during reasoning, o3 represents a significant leap in AI problem-solving capabilities. It achieved state-of-the-art results on the ARC-AGI benchmark, demonstrating near-human performance on novel reasoning challenges. The model is particularly strong at multi-step mathematical proofs, complex code debugging, and scientific analysis where careful step-by-step reasoning is essential. Originally priced at a premium, an 80% price reduction in June 2025 made o3 accessible to a much broader range of developers and applications.
View OpenAI profile →Key Differences: Reka Core vs GPT-o3
GPT-o3 is 1.8x cheaper on average, making it the better choice for high-volume applications.
GPT-o3 supports a larger context window (200K), allowing it to process longer documents in a single request.
When to use Reka Core
- +Quality matters more than cost
- +Your use case involves multimodal reasoning, video understanding, analysis
When to use GPT-o3
- +Budget is a concern and you need cost efficiency
- +You need to process long documents (200K context)
- +Your use case involves advanced reasoning, agentic tasks, research
Cost Analysis
At current pricing, GPT-o3 is 1.8x more affordable than Reka Core. For a typical enterprise workload processing 100M tokens per month:
Reka Core monthly cost
$900
100M tokens/mo (50/50 in/out)
GPT-o3 monthly cost
$500
100M tokens/mo (50/50 in/out)
The Verdict
GPT-o3 wins our head-to-head comparison with 4 out of 5 category wins. It's the stronger choice for advanced reasoning, agentic tasks, research, though Reka Core holds an edge in multimodal reasoning, video understanding, analysis.
Last compared: March 2026 · Data sourced from public benchmarks and official pricing pages