# Grok 4.20 vs Ornith-1.5-35B-A3B

> Side-by-side benchmark comparison for Grok 4.20 and Ornith-1.5-35B-A3B across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/grok-4-20-beta-vs-ornith-1-5-35b-a3b
- Last updated: October 2, 2026

- Shared sourced benchmarks: 4
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Grok 4.20 leads by point estimate. Conditional score ranges do not establish rank confidence. Choose using the category evidence and your own workload tests.

## Summary

- Grok 4.20 has the higher overall point estimate 59.19 to 32.61. Conditional score ranges do not establish rank confidence.
- The clearest category separation is in knowledge, where the averages are 50.2 for Grok 4.20 and 34.5 for Ornith-1.5-35B-A3B.
- The biggest single benchmark swing is SWE-bench Pro in Coding, with scores of 51.8% and 59.6%.
- Ornith-1.5-35B-A3B is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- Grok 4.20 also has the larger context window at 2M.

## Model Snapshot

| Property | Grok 4.20 | Ornith-1.5-35B-A3B |
|----------|----------|----------|
| Creator | xAI | Ornith AI |
| Type | Proprietary | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 2M | 262K |
| Overall Score | 59.19 | 32.61 |
| Benchmarks Covered | 23 | 18 |
| Pricing (input/output) | $1.25 / $2.50 | $0.00 / $0.00 |

## Category Breakdown

### Agentic

- Winner: Directional only
- Grok 4.20 public-lane score: 24 (Supported · #93/119)
- Ornith-1.5-35B-A3B public-lane score: 23.5 (Estimated · #95/119)

| Benchmark | Grok 4.20 | Ornith-1.5-35B-A3B | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 47.1% | Coming soon | Coming soon |
| DeepSearchQA | 62.8% | Coming soon | Coming soon |
| Gert Labs | 38.36% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 44.2% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 67.8% | Coming soon |
| HLE w/ tools | Coming soon | 33.4% | Coming soon |
| MCP Atlas | Coming soon | 70.2% | Coming soon |
| Toolathlon-Verified | Coming soon | 48.7% | Coming soon |
| WideResearch | Coming soon | 67.8% | Coming soon |
| BrowseComp | Coming soon | 67.6% | Coming soon |
| Claw-Eval | Coming soon | 72.5% | Coming soon |

### Coding

- Winner: Directional only
- Grok 4.20 public-lane score: 23 (Supported · #114/144)
- Ornith-1.5-35B-A3B public-lane score: 24 (Estimated · #110/144)

| Benchmark | Grok 4.20 | Ornith-1.5-35B-A3B | Winner |
|-----------|-----------|-----------|--------|
| LiveCodeBench Pro | 74.2% | Coming soon | Coming soon |
| SWE-bench Verified | 76.7% | 79% | Ornith-1.5-35B-A3B |
| SWE-bench Pro | 51.8% | 59.6% | Ornith-1.5-35B-A3B |
| Vibe Code Bench | 4.06% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 84.3% | Coming soon | Coming soon |
| SWE-bench (Vals) | 72.2% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 67.8% | Coming soon |
| SWE Multilingual | Coming soon | 71.4% | Coming soon |
| DeepSWE | Coming soon | 22.0% | Coming soon |
| frontierBench | Coming soon | 5.1% | Coming soon |
| NL2Repo | Coming soon | 46.2% | Coming soon |

### Reasoning

- Winner: Not comparable
- Grok 4.20 public-lane score: 41.1 (Unranked · 2 rankable rows)
- Ornith-1.5-35B-A3B public-lane score: Coming soon

| Benchmark | Grok 4.20 | Ornith-1.5-35B-A3B | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-2 | 53.3% | Coming soon | Coming soon |
| ARC-AGI-3 | 0.1% | Coming soon | Coming soon |

### Multimodal & Grounded

- Winner: Not comparable
- Grok 4.20 public-lane score: 35.6 (#44/49)
- Ornith-1.5-35B-A3B public-lane score: Coming soon

| Benchmark | Grok 4.20 | Ornith-1.5-35B-A3B | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | 75.2% | Coming soon | Coming soon |
| CharXiv | 60.9% | Coming soon | Coming soon |
| ERQA | 54.1% | Coming soon | Coming soon |
| SimpleVQA | 57.4% | Coming soon | Coming soon |
| MedXpertQA (MM) | 65.8% | Coming soon | Coming soon |

### Knowledge

- Winner: Directional only
- Grok 4.20 public-lane score: 50.2 (Supported · #64/171)
- Ornith-1.5-35B-A3B public-lane score: 34.5 (Estimated · #119/171)

| Benchmark | Grok 4.20 | Ornith-1.5-35B-A3B | Winner |
|-----------|-----------|-----------|--------|
| GPQA-D | 88.5% | 89.2% | Ornith-1.5-35B-A3B |
| HLE w/o tools | 31.6% | 25.6% | Grok 4.20 |
| HealthBench Hard | 20.3% | Coming soon | Coming soon |
| MedXpertQA (Text) | 50.2% | Coming soon | Coming soon |
| GPQA Diamond (Vals) | 88.6% | Coming soon | Coming soon |
| MMLU-Pro (Vals) | 86.3% | Coming soon | Coming soon |
| GPQA | Coming soon | 89.2% | Coming soon |
| HLE | Coming soon | 25.6% | Coming soon |

## FAQ

### Which is better overall, Grok 4.20 or Ornith-1.5-35B-A3B?

Grok 4.20 has the higher overall point estimate. Conditional score ranges do not establish rank confidence.

### Where is the biggest gap between Grok 4.20 and Ornith-1.5-35B-A3B?

The widest category gap is in knowledge, where the averages are 50.2 for Grok 4.20 and 34.5 for Ornith-1.5-35B-A3B.

### How many benchmarks does Grok 4.20 cover on BenchLM?

Grok 4.20 currently has 23 sourced benchmark scores on BenchLM.

### How many benchmarks does Ornith-1.5-35B-A3B cover on BenchLM?

Ornith-1.5-35B-A3B currently has 18 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Grok 4.20 vs Grok 4.20 Multi-agent](/compare/grok-4-20-beta-vs-grok-4-20-multi-agent-beta)
- [Ornith-1.5-35B-A3B vs Grok 4.20 Multi-agent](/compare/grok-4-20-multi-agent-beta-vs-ornith-1-5-35b-a3b)
- [Grok 4.20 vs Ornith-1.5-397B](/compare/grok-4-20-beta-vs-ornith-1-5-397b)
- [Ornith-1.5-35B-A3B vs Ornith-1.5-397B](/compare/ornith-1-5-35b-a3b-vs-ornith-1-5-397b)

## Explore More

- [Grok 4.20 profile](/models/grok-4-20-beta)
- [Ornith-1.5-35B-A3B profile](/models/ornith-1-5-35b-a3b)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)