# Grok 4.20 vs Inkling

> Side-by-side benchmark comparison for Grok 4.20 and Inkling across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/grok-4-20-beta-vs-inkling
- Last updated: October 14, 2026

- Shared sourced benchmarks: 11
- 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 57.24 to 52.13. Conditional score ranges do not establish rank confidence.
- The clearest category separation is in reasoning, where the averages are 44.9 for Grok 4.20 and 79 for Inkling.
- The biggest single benchmark swing is CharXiv in Multimodal & Grounded, with scores of 60.9% and 82%.
- Grok 4.20 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 | Inkling |
|----------|----------|----------|
| Creator | xAI | Thinking Machines Lab |
| Type | Proprietary | Open Weight |
| Reasoning | Reasoning | Hybrid |
| Context | 2M | 1M |
| Overall Score | 57.24 | 52.13 |
| Benchmarks Covered | 23 | 24 |
| Pricing (input/output) | $1.25 / $2.50 | $1.87 / $4.68 |

## Category Breakdown

### Agentic

- Winner: Inkling
- Grok 4.20 public-lane score: 24.3 (Supported · #100/124)
- Inkling public-lane score: 36.2 (Supported · #72/124)

| Benchmark | Grok 4.20 | Inkling | 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% | 47.6% | Inkling |
| Terminal-Bench 2.1 | Coming soon | 63.8% | Coming soon |
| BrowseComp | Coming soon | 77.1% | Coming soon |
| MCP Atlas | Coming soon | 74.1% | Coming soon |
| CWE-bench v1 | Coming soon | 37.0% | Coming soon |

### Coding

- Winner: Inkling
- Grok 4.20 public-lane score: 21.8 (Supported · #117/149)
- Inkling public-lane score: 34 (Supported · #80/149)

| Benchmark | Grok 4.20 | Inkling | Winner |
|-----------|-----------|-----------|--------|
| LiveCodeBench Pro | 74.2% | Coming soon | Coming soon |
| SWE-bench Verified | 76.7% | 77.6% | Inkling |
| SWE-bench Pro | 51.8% | 54.3% | Inkling |
| Vibe Code Bench | 4.06% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 84.3% | 85.5% | Inkling |
| SWE-bench (Vals) | 72.2% | 77.6% | Inkling |
| Terminal-Bench 2.1 | Coming soon | 63.8% | Coming soon |
| FrontierSWE v2 | Coming soon | 4.1% | Coming soon |

### Reasoning

- Winner: Not comparable
- Grok 4.20 public-lane score: 44.9 (Unranked · 2 rankable rows)
- Inkling public-lane score: 79 (#14/29)

| Benchmark | Grok 4.20 | Inkling | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-2 | 53.3% | Coming soon | Coming soon |
| ARC-AGI-3 | 0.1% | Coming soon | Coming soon |

### Multimodal & Grounded

- Winner: Inkling
- Grok 4.20 public-lane score: 53.4 (#47/54)
- Inkling public-lane score: 67.5 (#35/54)

| Benchmark | Grok 4.20 | Inkling | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | 75.2% | 73.5% | Grok 4.20 |
| CharXiv | 60.9% | 82% | Inkling |
| ERQA | 54.1% | Coming soon | Coming soon |
| SimpleVQA | 57.4% | Coming soon | Coming soon |
| MedXpertQA (MM) | 65.8% | Coming soon | Coming soon |
| CharXiv w/o tools | Coming soon | 78.1% | Coming soon |

### Knowledge

- Winner: Inkling
- Grok 4.20 public-lane score: 52.8 (Supported · #68/181)
- Inkling public-lane score: 54.5 (Supported · #62/181)

| Benchmark | Grok 4.20 | Inkling | Winner |
|-----------|-----------|-----------|--------|
| GPQA-D | 88.5% | 87.9% | Grok 4.20 |
| HLE w/o tools | 31.6% | 30% | Grok 4.20 |
| HealthBench Hard | 20.3% | Coming soon | Coming soon |
| MedXpertQA (Text) | 50.2% | Coming soon | Coming soon |
| GPQA Diamond (Vals) | 88.6% | 87.1% | Grok 4.20 |
| MMLU-Pro (Vals) | 86.3% | 86.3% | Tie |
| GPQA | Coming soon | 87.9% | Coming soon |
| HLE | Coming soon | 46% | Coming soon |

### Instruction Following

- Winner: Not comparable
- Grok 4.20 public-lane score: Coming soon
- Inkling public-lane score: 87.6 (#35/128)

| Benchmark | Grok 4.20 | Inkling | Winner |
|-----------|-----------|-----------|--------|
| IFBench | Coming soon | 79.8% | Coming soon |

### Mathematics

- Winner: Not comparable
- Grok 4.20 public-lane score: Coming soon
- Inkling public-lane score: 58.3 (#11/12)

| Benchmark | Grok 4.20 | Inkling | Winner |
|-----------|-----------|-----------|--------|
| AIME26 | Coming soon | 97.1% | Coming soon |
| FrontierMath v2 (Tiers 1-3) | Coming soon | 33.333% | Coming soon |
| FrontierMath v2 (Tier 4) | Coming soon | 4.878% | Coming soon |

## FAQ

### Which is better overall, Grok 4.20 or Inkling?

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 Inkling?

The widest category gap is in reasoning, where the averages are 44.9 for Grok 4.20 and 79 for Inkling.

### 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 Inkling cover on BenchLM?

Inkling currently has 24 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)
- [Inkling vs Grok 4.20 Multi-agent](/compare/grok-4-20-multi-agent-beta-vs-inkling)
- [Grok 4.20 vs Inkling-Small](/compare/grok-4-20-beta-vs-inkling-small)
- [Inkling vs Inkling-Small](/compare/inkling-vs-inkling-small)

## Explore More

- [Grok 4.20 profile](/models/grok-4-20-beta)
- [Inkling profile](/models/inkling)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)