Claude 3.5 Sonnet vs o3
| Claude 3.5 Sonnet | o3 | |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Context Window | 200,000 | 200,000 |
| Release Date | 2024-06-20 | 2025-04-16 |
| Input Price | $3.00/ 1M tokens | $2.00/ 1M tokens |
| Output Price | $15.00/ 1M tokens | $8.00/ 1M tokens |
| Best for | coding · writing · chatbot · analysis | mathematics · coding · scientific reasoning · complex planning |
Capabilities
| Claude 3.5 Sonnet | o3 | |
|---|---|---|
| Vision | ✓ | ✗ |
| Reasoning | ✓ | ✓ |
| Coding | ✓ | ✓ |
| Audio | ✗ | ✗ |
| Tools | ✓ | ✓ |
| Long Context | ✓ | ✓ |
Ranking Comparison
| Claude 3.5 Sonnet | o3 | |
|---|---|---|
| Overall | 78.4 | 39.4 |
| Benchmark | 80 | 0 |
| Capability | 85.7 | 57.1 |
| Price Efficiency | 100 | 100 |
| Context | 100 | 100 |
Overall = Benchmark 50% + Capability 20% + Price Efficiency 20% + Context 10%.
Benchmark Comparison
| Claude 3.5 Sonnet | o3 | |
|---|---|---|
| Coding | — | — |
| Reasoning | — | — |
| Math | — | — |
| Vision | — | — |
Price History
Claude 3.5 Sonnet
| Date | Input | Output |
|---|---|---|
| 2026-08-11 | $3.00 | $15.00 |
/ 1M tokens
o3
| Date | Input | Output |
|---|---|---|
| 2026-08-11 | $2.00 | $8.00 |
/ 1M tokens
Claude 3.5 Sonnet
Anthropic's flagship model known for strong coding and nuanced writing.
o3
OpenAI reasoning model that thinks before answering, strongest on STEM and logic.
Claude 3.5 Sonnet
Data Reliability
Benchmark · VerifiedOfficial · Verified
Data confidence: 90%
o3
Data Reliability
Benchmark · ExperimentalOfficial · Verified
Data confidence: 95%
Why compare these models?
These models are compared because:
- • Same capability category
Choose Claude 3.5 Sonnet if:
- • Higher overall score
Choose o3 if:
- • Lower input price
Frequently Asked Questions
Which model is better: Claude 3.5 Sonnet or o3?
Based on overall scores, Claude 3.5 Sonnet ranks higher (78.4 vs 39.4). See the comparison table for a full breakdown.
Which model is cheaper: Claude 3.5 Sonnet or o3?
o3 is cheaper: $2 vs $3 per 1M input tokens.
What are the capability differences between Claude 3.5 Sonnet and o3?
Claude 3.5 Sonnet: Vision