Updated April 2026 · Independent Analysis
OpenAI o1vsClaude 3.5 Sonnet
Both OpenAI o1 and Claude 3.5 Sonnet start at $20/mo. Claude 3.5 Sonnet is rated higher at 4.7/5 vs OpenAI o1's 4.6/5.
OpenAI o1vs Claude 3.5 Sonnet
★ 4.6/5-0.1 vs Claude 3.5 Sonnet
Only in OpenAI o1
- ✦ Chain-of-thought reasoning
- ✦ PhD-level science
- ✦ Advanced math
From $20/mo10M+ users · est. 2024
Try OpenAI o1 Free →
Claude 3.5 Sonnetvs OpenAI o1
★ 4.7/5+0.1 vs OpenAI o1
Only in Claude 3.5 Sonnet
- ✦ 200K context window
- ✦ Artifacts feature
- ✦ Computer use (beta)
✓ Free planFrom $20/mo10M+ users · est. 2024
Try Claude 3.5 Sonnet Free →Ratings Breakdown
OpenAI o1
4.6/5 avg
G2 Score4.6/5
Capterra Score4.5/5
G2 Rating4.6/5
Claude 3.5 Sonnet
4.7/5 avg
G2 Score4.7/5
Capterra Score4.5/5
G2 Rating4.7/5
Quick Stats
Feature Comparison
OpenAI o1 uniquely offers Chain-of-thought reasoning, PhD-level science, Advanced math. Claude 3.5 Sonnet uniquely offers 200K context window, Artifacts feature, Computer use (beta). Both share 9 features including Vision, API access, Function calling.
Feature
OpenAI o1
Claude 3.5 Sonnet
Vision
✓
✓
API access
✓
✓
Function calling
✓
✓
JSON mode
✓
✓
Streaming
✓
✓
System prompts
✓
✓
File uploads
✓
✓
Tool use
✓
✓
Document analysis
✓
✓
Chain-of-thought reasoning
✓
✗
PhD-level science
✓
✗
Advanced math
✓
✗
Complex coding
✓
✗
128K context
✓
✗
Safety evaluation
✓
✗
STEM optimization
✓
✗
Batch API
✓
✗
Benchmark-leading
✓
✗
Research tasks
✓
✗
Multi-step problem solving
✓
✗
200K context window
✗
✓
Artifacts feature
✗
✓
Computer use (beta)
✗
✓
Code generation
✗
✓
Advanced reasoning
✗
✓
Multi-language
✗
✓
Batch processing
✗
✓
Enterprise SSO
✗
✓
Custom instructions
✗
✓
Citation support
✗
✓
Safety controls
✗
✓
Total Features
20
20
Quick Verdict
Independent analysis based on features, pricing, and user ratings
Choose OpenAI o1 if you need:
- ✓ Chain-of-thought reasoning
- ✓ PhD-level science
- ✓ Advanced math
- ✓ Complex coding
- ✓ 128K context
Choose Claude 3.5 Sonnet if you need:
- ✓ 200K context window
- ✓ Artifacts feature
- ✓ Computer use (beta)
- ✓ Code generation
- ✓ Advanced reasoning
Pricing Comparison
Both OpenAI o1 and Claude 3.5 Sonnet start at $20/mo.
OpenAI o1 Plans
Paid plans only
PlusBest Value
$20/month- • o1 access (limited)
- • o1-mini included
Pro
$200/month- • Unlimited o1
- • o1 pro mode
Claude 3.5 Sonnet Plans
Free tier available
Free
Free- • Claude 3.5 Sonnet limited
- • Basic features
ProBest Value
$20/month- • 5x more usage
- • Projects
- • Priority access
Team
$30/month- • Everything in Pro
- • Central billing
- • Admin console
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