Grok 4.3 vs o3 Deep Research
Grok 4.3 vs o3 Deep Research: Grok 4.3 is cheaper for input-heavy usage ($1.25/M vs $10.00/M input tokens), while Grok 4.3 is better for long-context tasks (1,000,000 tokens).
Direct answer: choose Grok 4.3 for lower token spend and choose Grok 4.3 when your workload needs longer context.
Compare input and output token pricing, context windows, and monthly cost estimates on one page so you can pick the cheaper model fast.
Cost Comparison (1000 input + 500 output tokens, 100 requests/day)
Grok 4.3
o3 Deep Research
Cost Differences
o3 Deep Research costs more than Grok 4.3
Quick Recommendation
Winner for direct API pricing: Grok 4.3. At the default workload, Grok 4.3 saves about $82.50/month ($1,003.75/year) versus o3 Deep Research.
Feature Comparison
| Feature | Grok 4.3 | o3 Deep Research |
|---|---|---|
| Provider | xAI | OpenAI |
| Input Price | $1.25/1M tokens | $10.00/1M tokens |
| Output Price | $2.50/1M tokens | $40.00/1M tokens |
| Context Window | 1,000,000 tokens | 200,000 tokens |
| Max Output | 131,072 tokens | 32,768 tokens |
| Category | reasoning | reasoning |
| Capabilities | textvisionreasoning | textreasoningvisioncode |
| Release Date | 4/30/2026 | 6/26/2025 |
Grok 4.3 vs o3 Deep Research: Which Should You Choose?
Choosing between Grok 4.3 and o3 Deep Research depends on your priorities: cost efficiency, context length, or raw capability. Grok 4.3 is the more affordable option at $1.25/1M input tokens — 88% cheaper than o3 Deep Research. Meanwhile, Grok 4.3 offers a significantly larger context window at 1,000,000 tokens vs 200,000 for o3 Deep Research.
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.
Both models are in the reasoning category, making this a direct head-to-head comparison. At scale — say 10,000 requests per day — the cost difference adds up: Grok 4.3 would save you roughly $8,250.00/month compared to o3 Deep Research. For startups and indie developers, that difference can be significant.
Output costs matter too. Grok 4.3 charges $2.50/1M 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 4.3 has the edge here at $2.50/1M 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 4.3 when:
- • Budget is a primary concern
- • You need a larger context window (1,000,000 tokens)
- • You need longer outputs (up to 131,072 tokens)
- • You're already using xAI's API ecosystem
Choose o3 Deep Research when:
- • You need more capabilities (code)
- • You're already using OpenAI's API ecosystem
Pros and Caveats at a Glance
Grok 4.3
- • Input pricing: $1.25/M tokens
- • Output pricing: $2.50/M tokens
- • Context window: 1,000,000 tokens
- • Max output: 131,072 tokens
Watch out for
- • Trade-offs are minor in this matchup.
o3 Deep Research
- • Input pricing: $10.00/M tokens
- • Output pricing: $40.00/M tokens
- • Context window: 200,000 tokens
- • Max output: 32,768 tokens
Watch out for
- • Higher input cost than Grok 4.3
- • Higher output cost than Grok 4.3
- • Smaller context window than Grok 4.3
Try Different Scenarios
Use the calculator below to see how costs change with different usage patterns
Grok 4.3 (xAI)
o3 Deep Research (OpenAI)
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Sign Up for OpenAI →Frequently Asked Questions
Which is cheaper, Grok 4.3 or o3 Deep Research?▼
What is the context window difference between Grok 4.3 and o3 Deep Research?▼
Which model is better for AI Chatbot?▼
Which model has better overall pricing for heavy usage?▼
Where can I compare xAI and OpenAI API pricing beyond this model matchup?▼
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