# Quasar 438B vs Step 3.5 Flash

> Side-by-side benchmark comparison for Quasar 438B and Step 3.5 Flash across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/quasar-438b-vs-step-3-5-flash
- Last updated: October 17, 2026

- Shared sourced benchmarks: 0
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

No benchmark verdict yet: there is no shared sourced benchmark row for Quasar 438B and Step 3.5 Flash.

## Summary

- Quasar 438B and Step 3.5 Flash 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 | Quasar 438B | Step 3.5 Flash |
|----------|----------|----------|
| Creator | Multiverse Computing | StepFun |
| Type | Proprietary | Open Weight |
| Reasoning | Reasoning | Non-Reasoning |
| Context | 1M | 256K |
| Independent public score (not head-to-head) | 48.46 | 42.12 |
| Benchmarks Covered | 2 | 3 |
| Pricing (input/output) | $0.60 / $1.80 | $0.10 / $0.30 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Quasar 438B public-lane score: 40 (Estimated · #67/128)
- Step 3.5 Flash public-lane score: Coming soon

| Benchmark | Quasar 438B | Step 3.5 Flash | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.1 | 69.3% | Coming soon | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Quasar 438B public-lane score: 41.2 (Estimated · #63/150)
- Step 3.5 Flash public-lane score: Coming soon

| Benchmark | Quasar 438B | Step 3.5 Flash | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.1 | 69.3% | Coming soon | Coming soon |
| SWE-bench Verified | Coming soon | 74.4% | Coming soon |
| LiveCodeBench v6 | Coming soon | 86.4% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Quasar 438B public-lane score: 78.3 (Unranked · 2 rankable rows)
- Step 3.5 Flash public-lane score: Coming soon

### Knowledge

- Winner: Insufficient shared evidence
- Quasar 438B public-lane score: 46.7 (Estimated · #92/184)
- Step 3.5 Flash public-lane score: Coming soon

### Mathematics

- Winner: Insufficient shared evidence
- Quasar 438B public-lane score: Coming soon
- Step 3.5 Flash public-lane score: Coming soon

| Benchmark | Quasar 438B | Step 3.5 Flash | Winner |
|-----------|-----------|-----------|--------|
| AIME 2025 | Coming soon | 97.3% | Coming soon |

## FAQ

### Can I compare Quasar 438B and Step 3.5 Flash 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

- [Quasar 438B vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-quasar-438b)
- [Step 3.5 Flash vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-step-3-5-flash)
- [Quasar 438B vs GPT-6.1 Sol](/compare/gpt-6-1-sol-vs-quasar-438b)
- [Step 3.5 Flash vs GPT-6.1 Sol](/compare/gpt-6-1-sol-vs-step-3-5-flash)

## Explore More

- [Quasar 438B profile](/models/quasar-438b)
- [Step 3.5 Flash profile](/models/step-3-5-flash)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)