# Gemini 3.8 Flash vs Step 5 Preview

> Side-by-side benchmark comparison for Gemini 3.8 Flash and Step 5 Preview across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gemini-3-8-flash-vs-step-5-preview
- Last updated: September 21, 2026

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

## Quick Verdict

Pick Gemini 3.8 Flash if you want the stronger benchmark profile. Step 5 Preview only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- Gemini 3.8 Flash leads overall 75.99 to 72.
- The clearest category separation is in multimodal & grounded, where the averages are 82.9 for Gemini 3.8 Flash and 61.2 for Step 5 Preview.
- The biggest single benchmark swing is Terminal-Bench 4.0 in Agentic, with scores of 19.10% and 33.30%.
- Step 5 Preview is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.

## Model Snapshot

| Property | Gemini 3.8 Flash | Step 5 Preview |
|----------|----------|----------|
| Creator | Google | StepFun |
| Type | Proprietary | Pending |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 1M |
| Overall Score | 75.99 | null |
| Benchmarks Covered | 21 | 22 |
| Pricing (input/output) | $0.75 / $3.75 | $1.00 / $2.70 |

## Category Breakdown

### Agentic

- Winner: Coming soon
- Gemini 3.8 Flash public-lane score: 67.3 (Supported · #10/154)
- Step 5 Preview public-lane score: Coming soon

| Benchmark | Gemini 3.8 Flash | Step 5 Preview | Winner |
|-----------|-----------|-----------|--------|
| Finance Agent v2 | 61.4% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | 89.4% | 85.0% | Gemini 3.8 Flash |
| Terminal-Bench 4.0 | 19.10% | 33.30% | Step 5 Preview |
| OSWorld 2.0 | 59.0% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 81.3% | Coming soon | Coming soon |
| ApprenticeBench | 24% | Coming soon | Coming soon |
| CyberGym | Coming soon | 84.7% | Coming soon |
| AutomationBench | Coming soon | 44.0% | Coming soon |
| Toolathlon-Verified | Coming soon | 74.1% | Coming soon |
| MCP Atlas | Coming soon | 85.6% | Coming soon |
| JobBench | Coming soon | 59.0% | Coming soon |
| APEX-Agents | Coming soon | 37.8% | Coming soon |
| DRACO | Coming soon | 83.3% | Coming soon |
| BrowseComp | Coming soon | 88.7% | Coming soon |
| Agents' Last Exam | Coming soon | 29.5% | Coming soon |

### Coding

- Winner: Coming soon
- Gemini 3.8 Flash public-lane score: 68 (Supported · #8/156)
- Step 5 Preview public-lane score: Coming soon

| Benchmark | Gemini 3.8 Flash | Step 5 Preview | Winner |
|-----------|-----------|-----------|--------|
| DeepSWE | 73.8% | 67.7% | Gemini 3.8 Flash |
| Terminal-Bench 2.1 | 89.4% | 85.0% | Gemini 3.8 Flash |
| cursorBench32 | 69.2% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 89.5% | Coming soon | Coming soon |
| SWE-bench (Vals) | 80.0% | Coming soon | Coming soon |
| FrontierSWE v2 | 19.6% | Coming soon | Coming soon |
| cursorBench40 | 39.6% | Coming soon | Coming soon |
| SciCode | Coming soon | 58.9% | Coming soon |
| ProgramBench | Coming soon | 80.5% | Coming soon |
| sweMarathon | Coming soon | 72.7% | Coming soon |
| MLS-Bench Lite | Coming soon | 40.5% | Coming soon |

### Reasoning

- Winner: Coming soon
- Gemini 3.8 Flash public-lane score: 76.9 (#8/19)
- Step 5 Preview public-lane score: 78.5 (Unranked · 2 rankable rows)

| Benchmark | Gemini 3.8 Flash | Step 5 Preview | Winner |
|-----------|-----------|-----------|--------|
| CritPt | Coming soon | 20.9% | Coming soon |

### Multimodal & Grounded

- Winner: Coming soon
- Gemini 3.8 Flash public-lane score: 82.9 (#8/49)
- Step 5 Preview public-lane score: 61.2 (#28/49)

| Benchmark | Gemini 3.8 Flash | Step 5 Preview | Winner |
|-----------|-----------|-----------|--------|
| CharXiv w/o tools | 86.2% | Coming soon | Coming soon |
| LVBench | 87.1% | Coming soon | Coming soon |
| OfficeQA Pro | Coming soon | 60.3% | Coming soon |
| MMMU-Pro | Coming soon | 76% | Coming soon |

### Knowledge

- Winner: Coming soon
- Gemini 3.8 Flash public-lane score: 75.5 (Supported · #6/186)
- Step 5 Preview public-lane score: Coming soon

| Benchmark | Gemini 3.8 Flash | Step 5 Preview | Winner |
|-----------|-----------|-----------|--------|
| HLE-Verified | 54.9% | Coming soon | Coming soon |
| LABBench2 | 86.2% | Coming soon | Coming soon |
| BioMysteryBench (human-solvable) | 88.8% | Coming soon | Coming soon |
| BioMysteryBench (human-difficult) | 56.5% | Coming soon | Coming soon |
| GPQA Diamond (Vals) | 94.4% | Coming soon | Coming soon |
| MMLU-Pro (Vals) | 90.2% | Coming soon | Coming soon |
| GPQA-D | Coming soon | 93.5% | Coming soon |
| HLE | Coming soon | 46.5% | Coming soon |

## FAQ

### Which is better overall, Gemini 3.8 Flash or Step 5 Preview?

Gemini 3.8 Flash is ahead overall on BenchLM right now.

### Where is the biggest gap between Gemini 3.8 Flash and Step 5 Preview?

The widest category gap is in multimodal & grounded, where the averages are 82.9 for Gemini 3.8 Flash and 61.2 for Step 5 Preview.

### How many benchmarks does Gemini 3.8 Flash cover on BenchLM?

Gemini 3.8 Flash currently has 21 sourced benchmark scores on BenchLM.

### How many benchmarks does Step 5 Preview cover on BenchLM?

Step 5 Preview currently has 22 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Gemini 3.8 Flash vs Gemini 3.8 Flash Cyber](/compare/gemini-3-8-flash-vs-gemini-3-8-flash-cyber)
- [Step 5 Preview vs Gemini 3.8 Flash Cyber](/compare/gemini-3-8-flash-cyber-vs-step-5-preview)
- [Gemini 3.8 Flash vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-gemini-3-8-flash)
- [Step 5 Preview vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-step-5-preview)

## Explore More

- [Gemini 3.8 Flash profile](/models/gemini-3-8-flash)
- [Step 5 Preview profile](/models/step-5-preview)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)