# GPT-5.3-Codex-Spark vs Solar Pro 4

> Side-by-side benchmark comparison for GPT-5.3-Codex-Spark and Solar Pro 4 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gpt-5-3-codex-spark-vs-solar-pro-4
- Last updated: September 10, 2026

- Shared sourced benchmarks: 0
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

No benchmark verdict yet: there is no shared sourced benchmark row for GPT-5.3-Codex-Spark and Solar Pro 4.

## Summary

- GPT-5.3-Codex-Spark and Solar Pro 4 do not currently share a sourced benchmark row. The mirror therefore compares metadata, pricing, context windows, and each model's separately reported coverage without naming a benchmark winner.

## Model Snapshot

| Property | GPT-5.3-Codex-Spark | Solar Pro 4 |
|----------|----------|----------|
| Creator | OpenAI | Upstage |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 256K | 512K |
| Independent public score (not head-to-head) | 54.6 | null |
| Benchmarks Covered | 0 | 10 |
| Pricing (input/output) | Pricing unavailable / Pricing unavailable | $0.30 / $1.20 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- GPT-5.3-Codex-Spark public-lane score: Coming soon
- Solar Pro 4 public-lane score: Coming soon

| Benchmark | GPT-5.3-Codex-Spark | Solar Pro 4 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.1 | Coming soon | 57.0% | Coming soon |
| BrowseComp | Coming soon | 49.2% | Coming soon |
| MCP Atlas | Coming soon | 61.4% | Coming soon |
| APEX-Agents | Coming soon | 18.7% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- GPT-5.3-Codex-Spark public-lane score: Coming soon
- Solar Pro 4 public-lane score: Coming soon

| Benchmark | GPT-5.3-Codex-Spark | Solar Pro 4 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.1 | Coming soon | 57.0% | Coming soon |
| SWE-bench Verified | Coming soon | 70.6% | Coming soon |
| LiveCodeBench | Coming soon | 87.8% | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- GPT-5.3-Codex-Spark public-lane score: Coming soon
- Solar Pro 4 public-lane score: Coming soon

| Benchmark | GPT-5.3-Codex-Spark | Solar Pro 4 | Winner |
|-----------|-----------|-----------|--------|
| GPQA-D | Coming soon | 89.0% | Coming soon |
| MMLU-Pro | Coming soon | 86.3% | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- GPT-5.3-Codex-Spark public-lane score: Coming soon
- Solar Pro 4 public-lane score: Coming soon

| Benchmark | GPT-5.3-Codex-Spark | Solar Pro 4 | Winner |
|-----------|-----------|-----------|--------|
| AIME26 | Coming soon | 95.3% | Coming soon |

## FAQ

### Can I compare GPT-5.3-Codex-Spark and Solar Pro 4 on BenchLM yet?

Not fully yet. BenchLM is tracking both models, but sourced benchmark coverage is still incomplete for a fair score-level comparison.

### Why does this page show "coming soon" values?

BenchLM only calls winners when public benchmark coverage is available on both sides of the comparison.

## Related Comparisons

- [GPT-5.3-Codex-Spark vs GPT-5.3 Codex](/compare/gpt-5-3-codex-vs-gpt-5-3-codex-spark)
- [Solar Pro 4 vs GPT-5.3 Codex](/compare/gpt-5-3-codex-vs-solar-pro-4)
- [GPT-5.3-Codex-Spark vs Solar Pro 2](/compare/gpt-5-3-codex-spark-vs-solar-pro-2)
- [Solar Pro 4 vs Solar Pro 2](/compare/solar-pro-2-vs-solar-pro-4)

## Explore More

- [GPT-5.3-Codex-Spark profile](/models/gpt-5-3-codex-spark)
- [Solar Pro 4 profile](/models/solar-pro-4)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)