Grok 3 vs o3 Deep Research
Compare xAI and OpenAI AI models
Cost Comparison (1000 input + 500 output tokens, 100 requests/day)
Grok 3
o3 Deep Research
Cost Differences
o3 Deep Research costs more than Grok 3
Feature Comparison
| Feature | Grok 3 | o3 Deep Research |
|---|---|---|
| Provider | xAI | OpenAI |
| Input Price | $3.00/1M tokens | $10.00/1M tokens |
| Output Price | $15.00/1M tokens | $40.00/1M tokens |
| Context Window | 131,072 tokens | 200,000 tokens |
| Max Output | 131,072 tokens | 32,768 tokens |
| Category | flagship | reasoning |
| Capabilities | textvisionreasoningcode | textreasoningvisioncode |
| Release Date | 2/17/2025 | 6/26/2025 |
Grok 3 vs o3 Deep Research: Which Should You Choose?
Choosing between Grok 3 and o3 Deep Research depends on your priorities: cost efficiency, context length, or raw capability. Grok 3 is the more affordable option at $3.00/1M input tokens — 70% cheaper than o3 Deep Research. Meanwhile, o3 Deep Research offers a significantly larger context window at 200,000 tokens vs 131,072 for Grok 3.
These models come from different providers — xAI and OpenAI — which means different API ecosystems, SDKs, rate limits, and terms of service. If you're already integrated with xAI, switching to OpenAIinvolves migration effort beyond just pricing. Factor in your existing infrastructure when deciding.
These models target different tiers: Grok 3 is a flagship model while o3 Deep Research is reasoning. This means they're optimized for different workloads. Grok 3 is built for complex tasks that require deeper reasoning, while o3 Deep Research offers better value for routine operations.
Output costs matter too. Grok 3 charges $15.00/1M output tokens vs $40.00 for o3 Deep Research. For generation-heavy workloads (content creation, code generation, summarization), output pricing often dominates your bill. Grok 3 has the edge here at $15.00/1M output tokens.
Multimodal capabilities: Both models support vision (image understanding), so you can send images alongside text prompts with either option.
Best Use Cases
Choose Grok 3 when:
- • Budget is a primary concern
- • You need longer outputs (up to 131,072 tokens)
- • You're already using xAI's API ecosystem
Choose o3 Deep Research when:
- • You need a larger context window (200,000 tokens)
- • You're already using OpenAI's API ecosystem
Try Different Scenarios
Use the calculator below to see how costs change with different usage patterns
Grok 3 (xAI)
o3 Deep Research (OpenAI)
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