# Claude 4.1 Opus vs Grok 4.1 Fast (Reasoning)

> Side-by-side benchmark comparison for Claude 4.1 Opus and Grok 4.1 Fast (Reasoning) across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-4-1-opus-vs-grok-4-1-fast-reasoning
- Last updated: September 4, 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 Claude 4.1 Opus and Grok 4.1 Fast (Reasoning).

## Summary

- Claude 4.1 Opus and Grok 4.1 Fast (Reasoning) 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 | Claude 4.1 Opus | Grok 4.1 Fast (Reasoning) |
|----------|----------|----------|
| Creator | Anthropic | xAI |
| Type | Proprietary | Proprietary |
| Reasoning | Non-Reasoning | Reasoning |
| Context | 200K | 2M |
| Independent public score (not head-to-head) | 44.39 | 58.18 |
| Benchmarks Covered | 2 | 1 |
| Pricing (input/output) | $15.00 / $75.00 | N/A |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Claude 4.1 Opus public-lane score: 45.1 (Estimated · #95/151)
- Grok 4.1 Fast (Reasoning) public-lane score: Coming soon

| Benchmark | Claude 4.1 Opus | Grok 4.1 Fast (Reasoning) | Winner |
|-----------|-----------|-----------|--------|
| JobBench | 21.9% | Coming soon | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Claude 4.1 Opus public-lane score: 45.1 (Estimated · #111/183)
- Grok 4.1 Fast (Reasoning) public-lane score: 48.7 (Estimated · #85/183)

| Benchmark | Claude 4.1 Opus | Grok 4.1 Fast (Reasoning) | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 74.5% | Coming soon | Coming soon |
| Vibe Code Bench | Coming soon | 1.20% | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Claude 4.1 Opus public-lane score: Coming soon
- Grok 4.1 Fast (Reasoning) public-lane score: 53.3 (Unranked · 1 rankable row)

### Reasoning

- Winner: Insufficient shared evidence
- Claude 4.1 Opus public-lane score: Coming soon
- Grok 4.1 Fast (Reasoning) public-lane score: 71.6 (Unranked · 2 rankable rows)

### Knowledge

- Winner: Insufficient shared evidence
- Claude 4.1 Opus public-lane score: Coming soon
- Grok 4.1 Fast (Reasoning) public-lane score: 51.5 (Estimated · #82/181)

### Instruction Following

- Winner: Insufficient shared evidence
- Claude 4.1 Opus public-lane score: Coming soon
- Grok 4.1 Fast (Reasoning) public-lane score: 62.8 (#69/120)

## FAQ

### Can I compare Claude 4.1 Opus and Grok 4.1 Fast (Reasoning) 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

- [Claude 4.1 Opus vs Claude 4.1 Opus Thinking](/compare/claude-4-1-opus-vs-claude-4-1-opus-thinking)
- [Grok 4.1 Fast (Reasoning) vs Claude 4.1 Opus Thinking](/compare/claude-4-1-opus-thinking-vs-grok-4-1-fast-reasoning)
- [Claude 4.1 Opus vs Grok 4.1 Fast](/compare/claude-4-1-opus-vs-grok-4-1-fast)
- [Grok 4.1 Fast (Reasoning) vs Grok 4.1 Fast](/compare/grok-4-1-fast-vs-grok-4-1-fast-reasoning)

## Explore More

- [Claude 4.1 Opus profile](/models/claude-4-1-opus)
- [Grok 4.1 Fast (Reasoning) profile](/models/grok-4-1-fast-reasoning)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)