# DeepSeek V4 Pro 0813 vs GPT-5.3 Codex

> Side-by-side benchmark comparison for DeepSeek V4 Pro 0813 and GPT-5.3 Codex across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/deepseek-v4-pro-0813-vs-gpt-5-3-codex
- Last updated: September 27, 2026

- Shared sourced benchmarks: 6
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.7

## Quick Verdict

Pick DeepSeek V4 Pro 0813 if you want the stronger benchmark profile. GPT-5.3 Codex only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- DeepSeek V4 Pro 0813 leads overall 63.48 to 62.18.
- The clearest category separation is in reasoning, where the averages are 56.9 for DeepSeek V4 Pro 0813 and 79.3 for GPT-5.3 Codex.
- The biggest single benchmark swing is SWE-bench (Vals) in Coding, with scores of 96.4% and 78.0%.
- DeepSeek V4 Pro 0813 is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- DeepSeek V4 Pro 0813 also has the larger context window at 1M.

## Model Snapshot

| Property | DeepSeek V4 Pro 0813 | GPT-5.3 Codex |
|----------|----------|----------|
| Creator | DeepSeek | OpenAI |
| Type | Open Weight | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 400K |
| Overall Score | 63.48 | 62.18 |
| Benchmarks Covered | 42 | 10 |
| Pricing (input/output) | $1.32 / $3.96 | $1.75 / $14.00 |

## Category Breakdown

### Agentic

- Winner: Directional only
- DeepSeek V4 Pro 0813 public-lane score: 55 (Supported · #29/105)
- GPT-5.3 Codex public-lane score: 54.2 (Estimated · #31/105)

| Benchmark | DeepSeek V4 Pro 0813 | GPT-5.3 Codex | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 67.9% | 77.3% | GPT-5.3 Codex |
| Terminal-Bench 2.1 | 87.9% | Coming soon | Coming soon |
| BrowseComp | 83.4% | Coming soon | Coming soon |
| HLE w/ tools | 60.0% | Coming soon | Coming soon |
| MCP Atlas | 73.6% | Coming soon | Coming soon |
| Toolathlon | 51.8% | Coming soon | Coming soon |
| CyberGym | 83.3% | Coming soon | Coming soon |
| Toolathlon-Verified | 74.1% | Coming soon | Coming soon |
| Agents' Last Exam | 25.7% | Coming soon | Coming soon |
| AutomationBench | 31.8% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 54.7% | Coming soon | Coming soon |
| OSWorld-Verified | Coming soon | 64.7% | Coming soon |
| Gert Labs | Coming soon | 57.47% | Coming soon |
| JobBench | Coming soon | 33.7% | Coming soon |

### Coding

- Winner: GPT-5.3 Codex
- DeepSeek V4 Pro 0813 public-lane score: 50.3 (Supported · #39/135)
- GPT-5.3 Codex public-lane score: 55.9 (Supported · #26/135)

| Benchmark | DeepSeek V4 Pro 0813 | GPT-5.3 Codex | Winner |
|-----------|-----------|-----------|--------|
| LiveCodeBench Pass@1-COT | 93.5% | Coming soon | Coming soon |
| Codeforces | 3206.0 | Coming soon | Coming soon |
| SWE-bench Verified | 80.6% | 85% | GPT-5.3 Codex |
| SWE-bench Pro | 55.4% | 56.8% | GPT-5.3 Codex |
| SWE Multilingual | 76.2% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | 67.9% | Coming soon | Coming soon |
| Vibe Code Bench | 49.93% | 61.77% | GPT-5.3 Codex |
| Terminal-Bench 2.1 | 87.9% | Coming soon | Coming soon |
| NL2Repo | 61.5% | Coming soon | Coming soon |
| DeepSWE | 62.7% | Coming soon | Coming soon |
| DSBench-FullStack | 71.1% | Coming soon | Coming soon |
| DSBench-Hard | 67.2% | Coming soon | Coming soon |
| OpenHarmony Bench | 59.0% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 87.5% | 87.3% | DeepSeek V4 Pro 0813 |
| SWE-bench (Vals) | 96.4% | 78.0% | DeepSeek V4 Pro 0813 |
| SWE-Rebench | Coming soon | 58.2% | Coming soon |

### Reasoning

- Winner: Not comparable
- DeepSeek V4 Pro 0813 public-lane score: 56.9 (Unranked · 4 rankable rows)
- GPT-5.3 Codex public-lane score: 79.3 (Unranked · 2 rankable rows)

| Benchmark | DeepSeek V4 Pro 0813 | GPT-5.3 Codex | Winner |
|-----------|-----------|-----------|--------|
| MRCR 1M | 83.5% | Coming soon | Coming soon |
| CorpusQA 1M | 62.0% | Coming soon | Coming soon |
| ARC-AGI-1 | 90.00% | Coming soon | Coming soon |
| ARC-AGI-2 | 61.3% | Coming soon | Coming soon |

### Multimodal & Grounded

- Winner: Not comparable
- DeepSeek V4 Pro 0813 public-lane score: Coming soon
- GPT-5.3 Codex public-lane score: 75.7 (Unranked · 1 rankable row)

### Knowledge

- Winner: Directional only
- DeepSeek V4 Pro 0813 public-lane score: 63.4 (Estimated · #29/158)
- GPT-5.3 Codex public-lane score: 64.3 (Estimated · #26/158)

| Benchmark | DeepSeek V4 Pro 0813 | GPT-5.3 Codex | Winner |
|-----------|-----------|-----------|--------|
| MMLU-Pro | 87.5% | Coming soon | Coming soon |
| SimpleQA | 57.9% | Coming soon | Coming soon |
| Chinese-SimpleQA | 84.4% | Coming soon | Coming soon |
| GPQA | 90.1% | Coming soon | Coming soon |
| GPQA-D | 90.1% | Coming soon | Coming soon |
| HLE | 42.7% | Coming soon | Coming soon |
| GPQA Diamond (Vals) | 92.4% | Coming soon | Coming soon |
| MMLU-Pro (Vals) | 87.0% | Coming soon | Coming soon |

### Instruction Following

- Winner: Not comparable
- DeepSeek V4 Pro 0813 public-lane score: Coming soon
- GPT-5.3 Codex public-lane score: 91.2 (#14/124)

### Mathematics

- Winner: Not comparable
- DeepSeek V4 Pro 0813 public-lane score: 80.2 (Unranked · 4 rankable rows)
- GPT-5.3 Codex public-lane score: Coming soon

| Benchmark | DeepSeek V4 Pro 0813 | GPT-5.3 Codex | Winner |
|-----------|-----------|-----------|--------|
| HMMT Feb 2026 | 95.2% | Coming soon | Coming soon |
| IMOAnswerBench | 89.8% | Coming soon | Coming soon |
| Apex | 38.3% | Coming soon | Coming soon |
| Apex Shortlist | 90.2% | Coming soon | Coming soon |

## FAQ

### Which is better overall, DeepSeek V4 Pro 0813 or GPT-5.3 Codex?

DeepSeek V4 Pro 0813 is ahead overall on BenchLM right now.

### Where is the biggest gap between DeepSeek V4 Pro 0813 and GPT-5.3 Codex?

The widest category gap is in reasoning, where the averages are 56.9 for DeepSeek V4 Pro 0813 and 79.3 for GPT-5.3 Codex.

### How many benchmarks does DeepSeek V4 Pro 0813 cover on BenchLM?

DeepSeek V4 Pro 0813 currently has 42 sourced benchmark scores on BenchLM.

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

GPT-5.3 Codex currently has 10 sourced benchmark scores on BenchLM.

## Related Comparisons

- [DeepSeek V4 Pro 0813 vs GPT-5.3-Codex-Spark](/compare/deepseek-v4-pro-0813-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)
- [DeepSeek V4 Pro 0813 vs GPT-6 Astra](/compare/deepseek-v4-pro-0813-vs-gpt-6-astra)
- [GPT-5.3 Codex vs GPT-6 Astra](/compare/gpt-5-3-codex-vs-gpt-6-astra)

## Explore More

- [DeepSeek V4 Pro 0813 profile](/models/deepseek-v4-pro-0813)
- [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)