# Claude Opus 4.8 vs GPT-6 Sol

> Side-by-side benchmark comparison for Claude Opus 4.8 and GPT-6 Sol across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-opus-4-8-vs-gpt-6-sol
- Last updated: September 22, 2026

- Shared sourced benchmarks: 1
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

Evidence is too thin for a benchmark verdict: Claude Opus 4.8 and GPT-6 Sol share only 1 sourced benchmark row.

## Summary

- Only 1 shared sourced benchmark row is available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- GPT-6 Sol has the lower published output-token price.
- GPT-6 Sol has the larger published context window at 1.05M.

## Model Snapshot

| Property | Claude Opus 4.8 | GPT-6 Sol |
|----------|----------|----------|
| Creator | Anthropic | OpenAI |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 1.05M |
| Independent public score (not head-to-head) | 72.05 | 80.45 |
| Benchmarks Covered | 38 | 10 |
| Pricing (input/output) | $5.00 / $25.00 | $2.00 / $10.00 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Claude Opus 4.8 public-lane score: 63.2 (Supported · #15/157)
- GPT-6 Sol public-lane score: 69.7 (Estimated · #7/157)

| Benchmark | Claude Opus 4.8 | GPT-6 Sol | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 3.0 | 21.1% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | 74.6% | Coming soon | Coming soon |
| BrowseComp | 84.3% | Coming soon | Coming soon |
| DeepSearchQA | 93.1% | Coming soon | Coming soon |
| OSWorld-Verified | 83.4% | Coming soon | Coming soon |
| Finance Agent v2 | 53.9% | Coming soon | Coming soon |
| MCP Atlas | 82.2% | Coming soon | Coming soon |
| Toolathlon | 59.9% | Coming soon | Coming soon |
| Gert Labs | 72.97% | Coming soon | Coming soon |
| ResearchClawBench | 21.1% | Coming soon | Coming soon |
| OSWorld 2.0 | 20.6% | 60.5% | GPT-6 Sol |
| Terminal-Bench 2.1 (Vals) | 71.9% | Coming soon | Coming soon |
| Agents' Last Exam | Coming soon | 56.4% | Coming soon |
| AutomationBench | Coming soon | 33.2% | Coming soon |
| ExploitGym | Coming soon | 22.1% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Claude Opus 4.8 public-lane score: 66.4 (Supported · #14/159)
- GPT-6 Sol public-lane score: 74.3 (Estimated · #6/159)

| Benchmark | Claude Opus 4.8 | GPT-6 Sol | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 88.6% | Coming soon | Coming soon |
| SWE-bench Pro | 69.2% | Coming soon | Coming soon |
| SWE Multilingual | 84.4% | Coming soon | Coming soon |
| SWE Multimodal | 38.4% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | 74.6% | Coming soon | Coming soon |
| cursorBench31 | 58.4% | Coming soon | Coming soon |
| cursorBench32 | 62.3% | Coming soon | Coming soon |
| FrontierCode 1.1 Main | 46.5% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 87.8% | Coming soon | Coming soon |
| SWE-bench (Vals) | 88.6% | Coming soon | Coming soon |
| DeepSWE | Coming soon | 68.8% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Claude Opus 4.8 public-lane score: 55.5 (#15/17)
- GPT-6 Sol public-lane score: 78.5 (#5/17)

| Benchmark | Claude Opus 4.8 | GPT-6 Sol | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-2 | 72.1% | Coming soon | Coming soon |
| ARC-AGI-3 | 1.5% | Coming soon | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Claude Opus 4.8 public-lane score: 87.7 (#4/50)
- GPT-6 Sol public-lane score: 82.8 (Unranked · 1 rankable row)

| Benchmark | Claude Opus 4.8 | GPT-6 Sol | Winner |
|-----------|-----------|-----------|--------|
| OfficeQA Pro | 66.2% | Coming soon | Coming soon |
| ScreenSpot Pro | 87.9% | Coming soon | Coming soon |
| CharXiv | 89.9% | Coming soon | Coming soon |
| CharXiv w/o tools | 80.5% | Coming soon | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Claude Opus 4.8 public-lane score: 71.3 (Supported · #11/189)
- GPT-6 Sol public-lane score: 80.2 (Estimated · #6/189)

| Benchmark | Claude Opus 4.8 | GPT-6 Sol | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 93.6% | Coming soon | Coming soon |
| GPQA-D | 93.6% | Coming soon | Coming soon |
| HLE | 57.9% | Coming soon | Coming soon |
| HLE w/o tools | 49.8% | Coming soon | Coming soon |
| GPQA Diamond (Vals) | 92.4% | Coming soon | Coming soon |
| MMLU-Pro (Vals) | 89.6% | Coming soon | Coming soon |
| HealthBench (raw) | Coming soon | 47.1% | Coming soon |
| HealthBench (length-adjusted) | Coming soon | 53.2% | Coming soon |
| HealthBench Professional | Coming soon | 60.8% | Coming soon |
| HealthBench Professional (raw) | Coming soon | 59.5% | Coming soon |
| HealthBench Hard | Coming soon | 30.1% | Coming soon |

### Multilingual

- Winner: Insufficient shared evidence
- Claude Opus 4.8 public-lane score: Coming soon
- GPT-6 Sol public-lane score: Coming soon

| Benchmark | Claude Opus 4.8 | GPT-6 Sol | Winner |
|-----------|-----------|-----------|--------|
| INCLUDE | 87.6% | Coming soon | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- Claude Opus 4.8 public-lane score: 74 (#60/124)
- GPT-6 Sol public-lane score: Coming soon

### Mathematics

- Winner: Insufficient shared evidence
- Claude Opus 4.8 public-lane score: 65.2 (#2/7)
- GPT-6 Sol public-lane score: Coming soon

| Benchmark | Claude Opus 4.8 | GPT-6 Sol | Winner |
|-----------|-----------|-----------|--------|
| USAMO 2026 | 96.7% | Coming soon | Coming soon |
| FrontierMath v2 (Tiers 1-3) | 47.241% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 31.250% | Coming soon | Coming soon |

## FAQ

### Is there enough evidence to pick between Claude Opus 4.8 and GPT-6 Sol?

Not yet. The models share only 1 sourced benchmark row, so this mirror reports the available measurements and metadata without naming a broad winner.

### What can I compare safely on this page?

Published pricing, context windows, model type, and individual shared benchmark rows are directly comparable. Independent overall scores and non-overlapping benchmark coverage are labeled separately and should not be read as a controlled head-to-head result.

## Related Comparisons

- [Claude Opus 4.8 vs GPT-6 Astra](/compare/claude-opus-4-8-vs-gpt-6-astra)
- [GPT-6 Sol vs GPT-6 Astra](/compare/gpt-6-astra-vs-gpt-6-sol)
- [Claude Opus 4.8 vs GPT-6 Luna](/compare/claude-opus-4-8-vs-gpt-6-luna)
- [GPT-6 Sol vs GPT-6 Luna](/compare/gpt-6-luna-vs-gpt-6-sol)

## Explore More

- [Claude Opus 4.8 profile](/models/claude-opus-4-8)
- [GPT-6 Sol profile](/models/gpt-6-sol)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)