From the models shown in your screenshot, here's how I'd rank them for coding, reasoning, and overall capability:
🥇 1. Claude Opus 4.6 (Thinking)
Best overall
- ⭐⭐⭐⭐⭐ Coding
- ⭐⭐⭐⭐⭐ Complex reasoning
- ⭐⭐⭐⭐⭐ Architecture & debugging
- ⭐⭐⭐☆☆ Speed (slower due to thinking)
Use for:
- Large codebases
- Planning full-stack applications
- Refactoring
- Difficult bugs
- System design
🥈 2. Claude Sonnet 4.6 (Thinking)
Best balance of quality and speed
- ⭐⭐⭐⭐⭐ Coding
- ⭐⭐⭐⭐☆ Reasoning
- ⭐⭐⭐⭐⭐ Daily development
- ⭐⭐⭐⭐☆ Speed
Use for:
- Everyday programming
- Feature implementation
- Git help
- React/Node/Express
- Debugging
This is the one I'd use 80–90% of the time.
🥉 3. Gemini 3.5 Flash (High)
Very fast with surprisingly good coding.
- ⭐⭐⭐⭐☆ Coding
- ⭐⭐⭐⭐☆ Speed
- ⭐⭐⭐☆☆ Reasoning
Good when you need quick iterations.
4. Gemini 3.5 Flash
The standard version.
- Slightly weaker than Flash High.
- Excellent for general chat and simple coding.
5. GPT-OSS 120B (Medium)
Strong open-weight model.
- Good reasoning
- Good coding
- Not usually as polished as Claude on software engineering.
6. Gemini 3.1 Pro (High)
Still capable but older than the newer 3.5 Flash family.
7. Gemini 3.1 Pro (Low)
8. Gemini 3.5 Flash (Low)
Fastest but lowest quality among the Flash variants.
If you're doing your projects (ShareInfo, Medical Site, Balaji Dashboard)
I'd choose:
- 🥇 Claude Opus 4.6 (Thinking) — for architecture and difficult problems
- 🥈 Claude Sonnet 4.6 (Thinking) — daily coding (my recommendation)
- 🥉 Gemini 3.5 Flash (High) — quick implementation
- GPT-OSS 120B — alternative when you want another opinion
For different tasks
| Task | Best Model |
|---|---|
| Large codebase | 🥇 Claude Opus 4.6 |
| Daily programming | 🥇 Claude Sonnet 4.6 |
| React/Node.js | Claude Sonnet 4.6 |
| Debugging | Claude Opus 4.6 |
| System design | Claude Opus 4.6 |
| Fast responses | Gemini 3.5 Flash (High) |
| Writing | Claude Opus 4.6 |
| General questions | Gemini 3.5 Flash (High) |
Since you've been building fairly large Express/MongoDB applications with multiple features and frequent refactoring, Claude Sonnet 4.6 (Thinking) is probably the sweet spot for everyday work, while Claude Opus 4.6 (Thinking) is worth switching to when you're tackling major architectural changes or particularly tricky bugs.