# Leanstral 1.5 vs o3-pro

> Side-by-side benchmark comparison for Leanstral 1.5 and o3-pro across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/leanstral-1-5-vs-o3-pro
- Last updated: September 10, 2026

- Shared sourced benchmarks: 0
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

No benchmark verdict yet: there is no shared sourced benchmark row for Leanstral 1.5 and o3-pro.

## Summary

- Leanstral 1.5 and o3-pro do not currently share a sourced benchmark row. The mirror therefore compares metadata, pricing, context windows, and each model's separately reported coverage without naming a benchmark winner.

## Model Snapshot

| Property | Leanstral 1.5 | o3-pro |
|----------|----------|----------|
| Creator | Mistral | OpenAI |
| Type | Open Weight | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 256K | 200K |
| Independent public score (not head-to-head) | null | 47.33 |
| Benchmarks Covered | 0 | 0 |
| Pricing (input/output) | $0.00 / $0.00 | $20.00 / $80.00 |

## Category Breakdown

### Knowledge

- Winner: Insufficient shared evidence
- Leanstral 1.5 public-lane score: Coming soon
- o3-pro public-lane score: 48.4 (Estimated · #93/183)

## FAQ

### Can I compare Leanstral 1.5 and o3-pro on BenchLM yet?

Not fully yet. BenchLM is tracking both models, but sourced benchmark coverage is still incomplete for a fair score-level comparison.

### Why does this page show "coming soon" values?

BenchLM only calls winners when public benchmark coverage is available on both sides of the comparison.

## Related Comparisons

- [Leanstral 1.5 vs Leanstral](/compare/leanstral-vs-leanstral-1-5)
- [o3-pro vs Leanstral](/compare/leanstral-vs-o3-pro)
- [Leanstral 1.5 vs o3](/compare/leanstral-1-5-vs-o3)
- [o3-pro vs o3](/compare/o3-vs-o3-pro)

## Explore More

- [Leanstral 1.5 profile](/models/leanstral-1-5)
- [o3-pro profile](/models/o3-pro)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)