📊 Model Comparison
Claude Opus 4.6
Provider: Anthropic
API Status: ✅ Available
Strengths
- Better for complex projects
- Security audits
- Multi-agent workflows
- 1M token context window
- 128K output tokens
- Leads on Terminal-Bench 2.0 (with tools)
Benchmarks
Terminal Bench 2.0: Leads overall
BigLaw Bench: 90.2%
BigLaw Bench: 90.2%
GPT-5.3 Codex
Provider: OpenAI
API Status: ❌ Not Published
Strengths
- Better for speed and interactive coding
- Strong Terminal-Bench gains
- Excellent OSWorld performance
- Best for iterative coding
- Integrated IDE experience
Benchmarks
Terminal Bench 2.0: 77.3%
SWE-Bench Pro: 56.8%
SWE-Bench Pro: 56.8%
💰 Pricing Comparison
| Model | Input (per 1M) | Output (per 1M) | Access |
|---|---|---|---|
| Claude Opus 4.6 Standard |
$5.00 | $25.00 | API ✅ |
| Claude Opus 4.6 Premium (>200k tokens) |
~$10.00 | ~$37.50 | API ✅ |
| GPT-5.3 Codex | API pricing NOT published by OpenAI | ||
GPT-5.3 Codex Access Methods
- Codex app - Standalone application
- CLI - Command line interface
- IDE extensions - VS Code, etc.
- Codex Cloud - Via ChatGPT login
ChatGPT Subscription Tiers
- ChatGPT Go: ~$8/month
- ChatGPT Plus: $20/month
- ChatGPT Pro: $200/month
Note: GPT-5.3 Codex is included in these subscriptions (not per-token billing)
🎯 Which One Should You Choose?
Choose GPT-5.3 Codex if:
- You have ChatGPT Plus/Pro subscription
- You want integrated IDE experience
- You prefer interactive coding
- You need faster iteration cycles
Choose Claude Opus 4.6 if:
- You need API access
- You need long context (1M tokens)
- You want multi-agent workflows
- You work on complex projects
- You don't have ChatGPT subscription