# GPT-5.3 Codex vs Muse Wonder

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

- Canonical page: https://benchlm.ai/compare/gpt-5-3-codex-vs-muse-wonder
- Last updated: October 12, 2026

- Shared sourced benchmarks: 1
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Evidence is too thin for a benchmark verdict: GPT-5.3 Codex and Muse Wonder 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-5.3 Codex has the lower published output-token price.
- Muse Wonder has the larger published context window at 1M.

## Model Snapshot

| Property | GPT-5.3 Codex | Muse Wonder |
|----------|----------|----------|
| Creator | OpenAI | Meta |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 400K | 1M |
| Independent public score (not head-to-head) | 59.87 | 70.44 |
| Benchmarks Covered | 11 | 6 |
| Pricing (input/output) | $1.75 / $14.00 | $4.00 / $20.00 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- GPT-5.3 Codex public-lane score: 55.6 (Estimated · #35/123)
- Muse Wonder public-lane score: Coming soon

| Benchmark | GPT-5.3 Codex | Muse Wonder | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 77.3% | Coming soon | Coming soon |
| OSWorld-Verified | 64.7% | Coming soon | Coming soon |
| Gert Labs | 57.47% | Coming soon | Coming soon |
| JobBench | 33.7% | 70.5% | Muse Wonder |
| Finance Agent v2 | Coming soon | 56.6% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- GPT-5.3 Codex public-lane score: 54.8 (Supported · #31/148)
- Muse Wonder public-lane score: 69.8 (Supported · #10/148)

| Benchmark | GPT-5.3 Codex | Muse Wonder | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 85% | Coming soon | Coming soon |
| SWE-bench Pro | 56.8% | Coming soon | Coming soon |
| SWE-Rebench | 58.2% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | 77.3% | Coming soon | Coming soon |
| Vibe Code Bench | 61.77% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 87.3% | Coming soon | Coming soon |
| SWE-bench (Vals) | 78.0% | Coming soon | Coming soon |
| DeepSWE | Coming soon | 78.8% | Coming soon |
| ProgramBench | Coming soon | 50.0% | Coming soon |
| sweMarathon | Coming soon | 53.1% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- GPT-5.3 Codex public-lane score: 83.1 (Unranked · 2 rankable rows)
- Muse Wonder public-lane score: 81.3 (Unranked · 2 rankable rows)

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- GPT-5.3 Codex public-lane score: 80.1 (Unranked · 1 rankable row)
- Muse Wonder public-lane score: Coming soon

### Knowledge

- Winner: Insufficient shared evidence
- GPT-5.3 Codex public-lane score: 65.4 (Estimated · #29/180)
- Muse Wonder public-lane score: 74 (Supported · #12/180)

| Benchmark | GPT-5.3 Codex | Muse Wonder | Winner |
|-----------|-----------|-----------|--------|
| HealthBench Professional | Coming soon | 60.5% | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- GPT-5.3 Codex public-lane score: 92.6 (#18/127)
- Muse Wonder public-lane score: Coming soon

## FAQ

### Is there enough evidence to pick between GPT-5.3 Codex and Muse Wonder?

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

- [GPT-5.3 Codex vs GPT-5.3-Codex-Spark](/compare/gpt-5-3-codex-vs-gpt-5-3-codex-spark)
- [Muse Wonder vs GPT-5.3-Codex-Spark](/compare/gpt-5-3-codex-spark-vs-muse-wonder)
- [GPT-5.3 Codex vs Muse Wonder Full](/compare/gpt-5-3-codex-vs-muse-wonder-full)
- [Muse Wonder vs Muse Wonder Full](/compare/muse-wonder-vs-muse-wonder-full)

## Explore More

- [GPT-5.3 Codex profile](/models/gpt-5-3-codex)
- [Muse Wonder profile](/models/muse-wonder)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)