Claude 3.5 Sonnet vs o3 Deep Research
Compare Anthropic and OpenAI AI models
Cost Comparison (1000 input + 500 output tokens, 100 requests/day)
Claude 3.5 Sonnet
o3 Deep Research
Cost Differences
o3 Deep Research costs more than Claude 3.5 Sonnet
Feature Comparison
| Feature | Claude 3.5 Sonnet | o3 Deep Research |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Input Price | $3.00/1M tokens | $10.00/1M tokens |
| Output Price | $15.00/1M tokens | $40.00/1M tokens |
| Context Window | 200,000 tokens | 200,000 tokens |
| Max Output | 8,192 tokens | 32,768 tokens |
| Category | balanced | reasoning |
| Capabilities | textvisioncode | textreasoningvisioncode |
| Release Date | 10/22/2024 | 6/26/2025 |
Claude 3.5 Sonnet vs o3 Deep Research: Which Should You Choose?
Choosing between Claude 3.5 Sonnet and o3 Deep Research depends on your priorities: cost efficiency, context length, or raw capability. Claude 3.5 Sonnet is the more affordable option at $3.00/1M input tokens — 70% cheaper than o3 Deep Research.
These models come from different providers — Anthropic and OpenAI — which means different API ecosystems, SDKs, rate limits, and terms of service. If you're already integrated with Anthropic, switching to OpenAIinvolves migration effort beyond just pricing. Factor in your existing infrastructure when deciding.
These models target different tiers: Claude 3.5 Sonnet is a balanced model while o3 Deep Research is reasoning. This means they're optimized for different workloads. o3 Deep Research targets more demanding workloads, while Claude 3.5 Sonnet provides a cost-effective option for everyday tasks.
Output costs matter too. Claude 3.5 Sonnet 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. Claude 3.5 Sonnet 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 Claude 3.5 Sonnet when:
- • Budget is a primary concern
- • You're already using Anthropic's API ecosystem
Choose o3 Deep Research when:
- • You need more capabilities (reasoning)
- • You need longer outputs (up to 32,768 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
Claude 3.5 Sonnet (Anthropic)
o3 Deep Research (OpenAI)
Start using Claude 3.5 Sonnet today
Sign Up for Anthropic →Start using o3 Deep Research today
Sign Up for OpenAI →