# DeepSeek V4.1 Flash vs GPT-5.6 Terra

> Side-by-side benchmark comparison for DeepSeek V4.1 Flash and GPT-5.6 Terra across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/deepseek-v4-1-flash-vs-gpt-5-6-terra
- Last updated: September 10, 2026

- Shared sourced benchmarks: 5
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

Pick GPT-5.6 Terra if you want the stronger benchmark profile. DeepSeek V4.1 Flash only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- GPT-5.6 Terra leads overall 71.2 to 55.
- The biggest single benchmark swing is ExploitGym in Agentic, with scores of 15.3% and 23.2%.
- DeepSeek V4.1 Flash is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- GPT-5.6 Terra also has the larger context window at 1.05M.

## Model Snapshot

| Property | DeepSeek V4.1 Flash | GPT-5.6 Terra |
|----------|----------|----------|
| Creator | DeepSeek | OpenAI |
| Type | Open Weight | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 1.05M |
| Overall Score | null | 71.2 |
| Benchmarks Covered | 21 | 31 |
| Pricing (input/output) | $0.30 / $1.20 | $2.50 / $15.00 |

## Category Breakdown

### Agentic

- Winner: Coming soon
- DeepSeek V4.1 Flash public-lane score: Coming soon
- GPT-5.6 Terra public-lane score: 60.2 (Supported · #20/152)

| Benchmark | DeepSeek V4.1 Flash | GPT-5.6 Terra | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.1 | 90.6% | Coming soon | Coming soon |
| terminalBench3 | 30% | Coming soon | Coming soon |
| Terminal-Bench 4.0 | 31.20% | Coming soon | Coming soon |
| CyberGym | 88.1% | 81.8% | DeepSeek V4.1 Flash |
| ExploitGym | 15.3% | 23.2% | GPT-5.6 Terra |
| HLE w/ tools | 63.9% | Coming soon | Coming soon |
| AutomationBench | 54.8% | Coming soon | Coming soon |
| Agents' Last Exam | 31.8% | Coming soon | Coming soon |
| Terminal-Bench 3.0 | Coming soon | 20.8% | Coming soon |
| Terminal-Bench 2.0 | Coming soon | 87.4% | Coming soon |
| BrowseComp | Coming soon | 87.5% | Coming soon |
| OSWorld 2.0 | Coming soon | 50.2% | Coming soon |
| Toolathlon | Coming soon | 53.1% | Coming soon |
| Terminal-Bench 2.1 (Vals) | Coming soon | 77.5% | Coming soon |

### Coding

- Winner: Coming soon
- DeepSeek V4.1 Flash public-lane score: Coming soon
- GPT-5.6 Terra public-lane score: 67.1 (Supported · #9/151)

| Benchmark | DeepSeek V4.1 Flash | GPT-5.6 Terra | Winner |
|-----------|-----------|-----------|--------|
| Codeforces | 3471.0 | Coming soon | Coming soon |
| Terminal-Bench 2.1 | 90.6% | Coming soon | Coming soon |
| terminalBench3 | 30% | Coming soon | Coming soon |
| DeepSWE | 74.2% | 69.6% | DeepSeek V4.1 Flash |
| ProgramBench | 20.3% | Coming soon | Coming soon |
| NL2Repo | 65.4% | Coming soon | Coming soon |
| SWE-bench Pro | Coming soon | 63.4% | Coming soon |
| Terminal-Bench 2.0 | Coming soon | 87.4% | Coming soon |
| FrontierCode 1.1 Extended | Coming soon | 55.8% | Coming soon |
| cursorBench32 | Coming soon | 64.9% | Coming soon |
| VulcanBench v3 | Coming soon | 87.0% | Coming soon |
| LiveCodeBench (Vals) | Coming soon | 85.9% | Coming soon |
| SWE-bench (Vals) | Coming soon | 95.4% | Coming soon |

### Multimodal & Grounded

- Winner: Coming soon
- DeepSeek V4.1 Flash public-lane score: Coming soon
- GPT-5.6 Terra public-lane score: 77.1 (#15/48)

| Benchmark | DeepSeek V4.1 Flash | GPT-5.6 Terra | Winner |
|-----------|-----------|-----------|--------|
| Chartography (tools) | 78.9% | Coming soon | Coming soon |
| BabyVision w/ Python | 89.6% | Coming soon | Coming soon |
| ZeroBench w/ Python | 49.0% | Coming soon | Coming soon |
| MMMU-Pro | Coming soon | 80.7% | Coming soon |
| MMMU-Pro w/ Python | Coming soon | 82% | Coming soon |

### Reasoning

- Winner: Coming soon
- DeepSeek V4.1 Flash public-lane score: Coming soon
- GPT-5.6 Terra public-lane score: 64 (#11/18)

| Benchmark | DeepSeek V4.1 Flash | GPT-5.6 Terra | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-2 | Coming soon | 83.9% | Coming soon |
| ARC-AGI-3 | Coming soon | 0.8% | Coming soon |

### Knowledge

- Winner: Coming soon
- DeepSeek V4.1 Flash public-lane score: Coming soon
- GPT-5.6 Terra public-lane score: 69.3 (Supported · #15/182)

| Benchmark | DeepSeek V4.1 Flash | GPT-5.6 Terra | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 90.9% | 92.9% | GPT-5.6 Terra |
| GPQA-D | 90.9% | 92.9% | GPT-5.6 Terra |
| HLE | 36.8% | Coming soon | Coming soon |
| HLE-Verified | Coming soon | 51.1% | Coming soon |
| LABBench2 | Coming soon | 81.2% | Coming soon |
| HealthBench Professional | Coming soon | 57.7% | Coming soon |
| HealthBench Hard | Coming soon | 32.7% | Coming soon |
| GPQA Diamond (Vals) | Coming soon | 90.9% | Coming soon |
| MMLU-Pro (Vals) | Coming soon | 86.7% | Coming soon |

### Instruction Following

- Winner: Coming soon
- DeepSeek V4.1 Flash public-lane score: Coming soon
- GPT-5.6 Terra public-lane score: 87.1 (#34/121)

### Mathematics

- Winner: Coming soon
- DeepSeek V4.1 Flash public-lane score: Coming soon
- GPT-5.6 Terra public-lane score: 97 (Unranked · 3 rankable rows)

| Benchmark | DeepSeek V4.1 Flash | GPT-5.6 Terra | Winner |
|-----------|-----------|-----------|--------|
| Apex | 65.6% | Coming soon | Coming soon |
| FrontierMath (legacy) | Coming soon | 84.9% | Coming soon |
| FrontierMath v2 (Tiers 1-3) | Coming soon | 84.900% | Coming soon |
| FrontierMath v2 (Tier 4) | Coming soon | 68.300% | Coming soon |

## FAQ

### Which is better overall, DeepSeek V4.1 Flash or GPT-5.6 Terra?

GPT-5.6 Terra is ahead overall on BenchLM right now.

### How many benchmarks does DeepSeek V4.1 Flash cover on BenchLM?

DeepSeek V4.1 Flash currently has 21 sourced benchmark scores on BenchLM.

### How many benchmarks does GPT-5.6 Terra cover on BenchLM?

GPT-5.6 Terra currently has 31 sourced benchmark scores on BenchLM.

## Related Comparisons

- [DeepSeek V4.1 Flash vs GPT-5.6 Sol](/compare/deepseek-v4-1-flash-vs-gpt-5-6-sol)
- [GPT-5.6 Terra vs GPT-5.6 Sol](/compare/gpt-5-6-sol-vs-gpt-5-6-terra)
- [DeepSeek V4.1 Flash vs GPT-5.6 Luna](/compare/deepseek-v4-1-flash-vs-gpt-5-6-luna)
- [GPT-5.6 Terra vs GPT-5.6 Luna](/compare/gpt-5-6-luna-vs-gpt-5-6-terra)

## Explore More

- [DeepSeek V4.1 Flash profile](/models/deepseek-v4-1-flash)
- [GPT-5.6 Terra profile](/models/gpt-5-6-terra)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)