# Claude Opus 4.7 vs GPT-5.3 Codex

> Side-by-side benchmark comparison for Claude Opus 4.7 and GPT-5.3 Codex across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-opus-4-7-vs-gpt-5-3-codex
- Last updated: October 14, 2026

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

## Quick Verdict

Claude Opus 4.7 leads by point estimate. Conditional score ranges do not establish rank confidence. Choose using the category evidence and your own workload tests.

## Summary

- Claude Opus 4.7 has the higher overall point estimate 65.18 to 59.84. Conditional score ranges do not establish rank confidence.
- The clearest category separation is in agentic, where the averages are 54 for Claude Opus 4.7 and 55.2 for GPT-5.3 Codex.
- The biggest single benchmark swing is Vibe Code Bench in Coding, with scores of 71.00% and 61.77%.
- GPT-5.3 Codex is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- Claude Opus 4.7 also has the larger context window at 1M.

## Model Snapshot

| Property | Claude Opus 4.7 | GPT-5.3 Codex |
|----------|----------|----------|
| Creator | Anthropic | OpenAI |
| Type | Proprietary | Proprietary |
| Reasoning | Non-Reasoning | Reasoning |
| Context | 1M | 400K |
| Overall Score | 65.18 | 59.84 |
| Benchmarks Covered | 15 | 11 |
| Pricing (input/output) | $5.00 / $25.00 | $1.75 / $14.00 |

## Category Breakdown

### Agentic

- Winner: Directional only
- Claude Opus 4.7 public-lane score: 54 (Supported · #40/124)
- GPT-5.3 Codex public-lane score: 55.2 (Estimated · #35/124)

| Benchmark | Claude Opus 4.7 | GPT-5.3 Codex | Winner |
|-----------|-----------|-----------|--------|
| Gert Labs | 65.59% | 57.47% | Claude Opus 4.7 |
| ResearchClawBench | 20.7% | Coming soon | Coming soon |
| OSWorld 2.0 | 13.9% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 68.5% | Coming soon | Coming soon |
| ApprenticeBench | 7% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | Coming soon | 77.3% | Coming soon |
| OSWorld-Verified | Coming soon | 64.7% | Coming soon |
| JobBench | Coming soon | 33.7% | Coming soon |

### Coding

- Winner: Claude Opus 4.7
- Claude Opus 4.7 public-lane score: 55.6 (Supported · #30/149)
- GPT-5.3 Codex public-lane score: 54.5 (Supported · #31/149)

| Benchmark | Claude Opus 4.7 | GPT-5.3 Codex | Winner |
|-----------|-----------|-----------|--------|
| Vibe Code Bench | 71.00% | 61.77% | Claude Opus 4.7 |
| React Native Evals | 82.8% | Coming soon | Coming soon |
| FrontierCode 1.1 Main | 38.5% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 85.1% | 87.3% | GPT-5.3 Codex |
| SWE-bench (Vals) | 82.0% | 78.0% | Claude Opus 4.7 |
| PostTrainBench v1.1 | 28.6% | Coming soon | Coming soon |
| SWE-bench Verified | Coming soon | 85% | Coming soon |
| SWE-bench Pro | Coming soon | 56.8% | Coming soon |
| SWE-Rebench | Coming soon | 58.2% | Coming soon |
| Terminal-Bench 2.0 | Coming soon | 77.3% | Coming soon |

### Reasoning

- Winner: Not comparable
- Claude Opus 4.7 public-lane score: Coming soon
- GPT-5.3 Codex public-lane score: 83.1 (Unranked · 2 rankable rows)

### Multimodal & Grounded

- Winner: Not comparable
- Claude Opus 4.7 public-lane score: Coming soon
- GPT-5.3 Codex public-lane score: 80.1 (Unranked · 1 rankable row)

### Knowledge

- Winner: Directional only
- Claude Opus 4.7 public-lane score: 65.3 (Estimated · #30/181)
- GPT-5.3 Codex public-lane score: 65.3 (Estimated · #31/181)

| Benchmark | Claude Opus 4.7 | GPT-5.3 Codex | Winner |
|-----------|-----------|-----------|--------|
| GPQA Diamond (Vals) | 90.2% | Coming soon | Coming soon |
| MMLU-Pro (Vals) | 89.9% | Coming soon | Coming soon |

### Instruction Following

- Winner: Not comparable
- Claude Opus 4.7 public-lane score: Coming soon
- GPT-5.3 Codex public-lane score: 92.6 (#18/128)

### Mathematics

- Winner: Not comparable
- Claude Opus 4.7 public-lane score: 72.9 (Unranked · 2 rankable rows)
- GPT-5.3 Codex public-lane score: Coming soon

| Benchmark | Claude Opus 4.7 | GPT-5.3 Codex | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | 70.175% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 31.707% | Coming soon | Coming soon |

## FAQ

### Which is better overall, Claude Opus 4.7 or GPT-5.3 Codex?

Claude Opus 4.7 has the higher overall point estimate. Conditional score ranges do not establish rank confidence.

### Where is the biggest gap between Claude Opus 4.7 and GPT-5.3 Codex?

The widest category gap is in agentic, where the averages are 54 for Claude Opus 4.7 and 55.2 for GPT-5.3 Codex.

### How many benchmarks does Claude Opus 4.7 cover on BenchLM?

Claude Opus 4.7 currently has 15 sourced benchmark scores on BenchLM.

### How many benchmarks does GPT-5.3 Codex cover on BenchLM?

GPT-5.3 Codex currently has 11 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Claude Opus 4.7 vs Claude Opus 4.7 (Adaptive)](/compare/claude-opus-4-7-vs-claude-opus-4-7-adaptive)
- [GPT-5.3 Codex vs Claude Opus 4.7 (Adaptive)](/compare/claude-opus-4-7-adaptive-vs-gpt-5-3-codex)
- [Claude Opus 4.7 vs GPT-5.3-Codex-Spark](/compare/claude-opus-4-7-vs-gpt-5-3-codex-spark)
- [GPT-5.3 Codex vs GPT-5.3-Codex-Spark](/compare/gpt-5-3-codex-vs-gpt-5-3-codex-spark)

## Explore More

- [Claude Opus 4.7 profile](/models/claude-opus-4-7)
- [GPT-5.3 Codex profile](/models/gpt-5-3-codex)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)