# Claude Opus 4.6 (Adaptive) vs GPT-5.4 nano

> Side-by-side benchmark comparison for Claude Opus 4.6 (Adaptive) and GPT-5.4 nano across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-opus-4-6-thinking-vs-gpt-5-4-nano
- Last updated: September 29, 2026

- Shared sourced benchmarks: 1
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.7

## Quick Verdict

Evidence is too thin for a benchmark verdict: Claude Opus 4.6 (Adaptive) and GPT-5.4 nano 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.
- Claude Opus 4.6 (Adaptive) has the larger published context window at 1M.

## Model Snapshot

| Property | Claude Opus 4.6 (Adaptive) | GPT-5.4 nano |
|----------|----------|----------|
| Creator | Anthropic | OpenAI |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 400K |
| Independent public score (not head-to-head) | null | 50.7 |
| Benchmarks Covered | 1 | 20 |
| Pricing (input/output) | N/A | $0.20 / $1.25 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Claude Opus 4.6 (Adaptive) public-lane score: 46.9 (Estimated · #42/117)
- GPT-5.4 nano public-lane score: 31.9 (Supported · #75/117)

| Benchmark | Claude Opus 4.6 (Adaptive) | GPT-5.4 nano | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | Coming soon | 46.3% | Coming soon |
| OSWorld-Verified | Coming soon | 39% | Coming soon |
| MCP Atlas | Coming soon | 56.1% | Coming soon |
| Toolathlon | Coming soon | 35.5% | Coming soon |
| τ²-bench results | Coming soon | 92.5% | Coming soon |
| Terminal-Bench 2.1 (Vals) | Coming soon | 41.6% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Claude Opus 4.6 (Adaptive) public-lane score: 54.2 (Estimated · #33/143)
- GPT-5.4 nano public-lane score: 31.2 (Supported · #91/143)

| Benchmark | Claude Opus 4.6 (Adaptive) | GPT-5.4 nano | Winner |
|-----------|-----------|-----------|--------|
| Vibe Code Bench | 53.50% | 26.10% | Claude Opus 4.6 (Adaptive) |
| LiveCodeBench (Vals) | Coming soon | 84.0% | Coming soon |
| SWE-bench (Vals) | Coming soon | 69.8% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Claude Opus 4.6 (Adaptive) public-lane score: Coming soon
- GPT-5.4 nano public-lane score: 37 (Unranked · 4 rankable rows)

| Benchmark | Claude Opus 4.6 (Adaptive) | GPT-5.4 nano | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-1 | Coming soon | 51.50% | Coming soon |
| ARC-AGI-2 | Coming soon | 5.7% | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Claude Opus 4.6 (Adaptive) public-lane score: Coming soon
- GPT-5.4 nano public-lane score: 24.9 (#47/50)

| Benchmark | Claude Opus 4.6 (Adaptive) | GPT-5.4 nano | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | Coming soon | 66.1% | Coming soon |
| MMMU-Pro w/ Python | Coming soon | 69.5% | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Claude Opus 4.6 (Adaptive) public-lane score: Coming soon
- GPT-5.4 nano public-lane score: 37.7 (Supported · #105/169)

| Benchmark | Claude Opus 4.6 (Adaptive) | GPT-5.4 nano | Winner |
|-----------|-----------|-----------|--------|
| GPQA | Coming soon | 82.8% | Coming soon |
| HLE | Coming soon | 37.7% | Coming soon |
| HLE w/o tools | Coming soon | 24.3% | Coming soon |
| GPQA Diamond (Vals) | Coming soon | 77.5% | Coming soon |
| MMLU-Pro (Vals) | Coming soon | 77.2% | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- Claude Opus 4.6 (Adaptive) public-lane score: Coming soon
- GPT-5.4 nano public-lane score: 91.9 (#9/124)

### Mathematics

- Winner: Insufficient shared evidence
- Claude Opus 4.6 (Adaptive) public-lane score: Coming soon
- GPT-5.4 nano public-lane score: 43.8 (Unranked · 2 rankable rows)

| Benchmark | Claude Opus 4.6 (Adaptive) | GPT-5.4 nano | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | Coming soon | 25.860% | Coming soon |
| FrontierMath v2 (Tier 4) | Coming soon | 6.250% | Coming soon |

## FAQ

### Is there enough evidence to pick between Claude Opus 4.6 (Adaptive) and GPT-5.4 nano?

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 4.6 (Adaptive) vs Claude Opus 4.6](/compare/claude-opus-4-6-vs-claude-opus-4-6-thinking)
- [GPT-5.4 nano vs Claude Opus 4.6](/compare/claude-opus-4-6-vs-gpt-5-4-nano)
- [Claude Opus 4.6 (Adaptive) vs GPT-5.4 Pro](/compare/claude-opus-4-6-thinking-vs-gpt-5-4-pro)
- [GPT-5.4 nano vs GPT-5.4 Pro](/compare/gpt-5-4-nano-vs-gpt-5-4-pro)

## Explore More

- [Claude Opus 4.6 (Adaptive) profile](/models/claude-opus-4-6-thinking)
- [GPT-5.4 nano profile](/models/gpt-5-4-nano)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)