# Grok 3 [Beta] vs Leanstral 1.5

> Side-by-side benchmark comparison for Grok 3 [Beta] and Leanstral 1.5 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/grok-3-beta-vs-leanstral-1-5
- 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 Grok 3 [Beta] and Leanstral 1.5.

## Summary

- Grok 3 [Beta] and Leanstral 1.5 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 | Grok 3 [Beta] | Leanstral 1.5 |
|----------|----------|----------|
| Creator | xAI | Mistral |
| Type | Proprietary | Open Weight |
| Reasoning | Non-Reasoning | Reasoning |
| Context | 128K | 256K |
| Independent public score (not head-to-head) | 51.71 | null |
| Benchmarks Covered | 2 | 0 |
| Pricing (input/output) | Pricing unavailable / Pricing unavailable | $0.00 / $0.00 |

## Category Breakdown

### Mathematics

- Winner: Insufficient shared evidence
- Grok 3 [Beta] public-lane score: 26.9 (Unranked · 2 rankable rows)
- Leanstral 1.5 public-lane score: Coming soon

| Benchmark | Grok 3 [Beta] | Leanstral 1.5 | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | 3.793% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 0.000% | Coming soon | Coming soon |

## FAQ

### Can I compare Grok 3 [Beta] and Leanstral 1.5 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

- [Grok 3 [Beta] vs Leanstral](/compare/grok-3-beta-vs-leanstral)
- [Leanstral 1.5 vs Leanstral](/compare/leanstral-vs-leanstral-1-5)
- [Grok 3 [Beta] vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-grok-3-beta)
- [Leanstral 1.5 vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-leanstral-1-5)

## Explore More

- [Grok 3 [Beta] profile](/models/grok-3-beta)
- [Leanstral 1.5 profile](/models/leanstral-1-5)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)