Agentic
Directional only- DeepSeek V4 Flash
- 49.1
- GPT-5.6 Sol
- 92.0
- Weighted basis
- 1 vs 2 rows
- Reading
- Directional only
Model comparison
DeepSeek V4 Flash vs GPT-5.6 Sol
Updated August 10, 2026. Public scores include evidence status and uncertainty. They are not guarantees for a specific workload.
At least one model is not scored in the current public ranking lane, so the page does not name an overall quality winner.
6 results are shared. Category rows based on different benchmark sets are marked directional and do not name a winner.
Which one for your work
Recommendations appear only when a shared evidence basis or an explicit operating constraint supports the call. Secondary and unsupported use cases stay disclosed below the initial list.
Long documents
Prompts that approach the documented context limit
GPT-5.6 Sol
GPT-5.6 Sol has the larger documented context window.
Confidence: documented
Chat turn cost
1K fresh input + 500 output tokens
DeepSeek V4 Flash
DeepSeek V4 Flash has the lower estimated token cost for this stated workload. Costs use the listed standard API rates.
Confidence: listed-rates
Cache-heavy agent loop cost
200K cached + 20K fresh input + 10K output tokens
DeepSeek V4 Flash
DeepSeek V4 Flash has the lower estimated token cost for this stated workload. Costs use the listed standard API rates.
Confidence: listed-rates
Show secondary and unsupported calls
Repository review cost
50K fresh input + 3K output tokens
DeepSeek V4 Flash
DeepSeek V4 Flash has the lower estimated token cost for this stated workload. Costs use the listed standard API rates.
Confidence: listed-rates
Coding work
Code generation, repair, and software-engineering tasks
Not enough matched evidence
The category averages use different weighted benchmark sets, so they are directional rather than like-for-like.
Confidence: limited
Agentic work
Tool use, computer use, and multi-step task completion
Not enough matched evidence
The category averages use different weighted benchmark sets, so they are directional rather than like-for-like.
Confidence: limited
What is actually comparable
Shared results can support a head-to-head reading. Results present for only one model describe coverage, not superiority.
16 DeepSeek V4 Flash only
6 Shared
18 GPT-5.6 Sol only
- Shared results
- 6
- DeepSeek V4 Flash only
- 16
- GPT-5.6 Sol only
- 18
- Like-for-like categories
- 0 / 8
3 categories use different evidence sets. Those rows remain visible for coverage context but do not name a winner.
Category results, on a stated basis
Each row states whether both averages use the same weighted benchmark set. Directional and not-comparable rows remain visible, but they never receive a winner in this template.
Coding
Directional only- DeepSeek V4 Flash
- 64.2
- GPT-5.6 Sol
- 64.6
- Weighted basis
- 2 vs 1 rows
- Reading
- Directional only
Knowledge
Directional only- DeepSeek V4 Flash
- 38.8
- GPT-5.6 Sol
- 94.6
- Weighted basis
- 4 vs 1 rows
- Reading
- Directional only
Reasoning
Not comparable- DeepSeek V4 Flash
- Not measured
- GPT-5.6 Sol
- 92.5
- Weighted basis
- 0 vs 1 rows
- Reading
- Not comparable
Math
Not comparable- DeepSeek V4 Flash
- 40.8
- GPT-5.6 Sol
- 87.5
- Weighted basis
- 1 vs 2 rows
- Reading
- Not comparable
Multilingual
Not comparable- DeepSeek V4 Flash
- Not measured
- GPT-5.6 Sol
- Not measured
- Weighted basis
- 0 vs 0 rows
- Reading
- Not comparable
Multimodal
Not comparable- DeepSeek V4 Flash
- Not measured
- GPT-5.6 Sol
- 83.0
- Weighted basis
- 0 vs 1 rows
- Reading
- Not comparable
Instruction following
Not comparable- DeepSeek V4 Flash
- Not measured
- GPT-5.6 Sol
- Not measured
- Weighted basis
- 0 vs 0 rows
- Reading
- Not comparable
| Category | DeepSeek V4 Flash | GPT-5.6 Sol | Weighted basis | Reading |
|---|---|---|---|---|
| Agentic | 49.1 | 92.0 | Directional only1 vs 2 rows | Directional only |
| Coding | 64.2 | 64.6 | Directional only2 vs 1 rows | Directional only |
| Knowledge | 38.8 | 94.6 | Directional only4 vs 1 rows | Directional only |
| Reasoning | Not measured | 92.5 | Not comparable0 vs 1 rows | Not comparable |
| Math | 40.8 | 87.5 | Not comparable1 vs 2 rows | Not comparable |
| Multilingual | Not measured | Not measured | Not comparable0 vs 0 rows | Not comparable |
| Multimodal | Not measured | 83.0 | Not comparable0 vs 1 rows | Not comparable |
| Instruction following | Not measured | Not measured | Not comparable0 vs 0 rows | Not comparable |
Shape of the matched evidence
Only shared public evidence is shown. Sparse evidence stays a ruled list rather than being closed into a radar shape.
Too few matched category axes support a radar. The ruled list below shows only shared benchmark results; positions use each benchmark’s normalized display scale when available.
Terminal-Bench 2.0
Agentic
DeepSeek V4 Flash: 49.1%GPT-5.6 Sol: 91.9%Normalized gap 42.8DeepSeek V4 Flash source GPT-5.6 Sol sourceGPQA
Knowledge
DeepSeek V4 Flash: 71.2%GPT-5.6 Sol: 94.6%Normalized gap 23.4DeepSeek V4 Flash source GPT-5.6 Sol sourceSWE-bench Pro
Coding
DeepSeek V4 Flash: 49.1%GPT-5.6 Sol: 64.6%Normalized gap 15.5DeepSeek V4 Flash source GPT-5.6 Sol source
What each workload costs
Three fixed token mixes turn per-token rates into comparable decisions. Each scenario states context fit and whether cached input had to fall back to the published list-input rate.
Chat turn
1K fresh input + 500 output tokens
- DeepSeek V4 Flash
- $0.00028
- Fits in one request
- GPT-5.6 Sol
- $0.02
- Fits in one request
DeepSeek V4 Flash has the lower modeled cost
Costs use the listed standard API rates.
Repository review
50K fresh input + 3K output tokens
- DeepSeek V4 Flash
- $0.00784
- Fits in one request
- GPT-5.6 Sol
- $0.34
- Fits in one request
DeepSeek V4 Flash has the lower modeled cost
Costs use the listed standard API rates.
Cache-heavy agent loop
200K cached + 20K fresh input + 10K output tokens
- DeepSeek V4 Flash
- $0.00616
- Fits in one request
- GPT-5.6 Sol
- $0.5
- Fits in one request
DeepSeek V4 Flash has the lower modeled cost
Costs use the listed standard API rates.
Specification differences
Sourced differences are shown directly. Missing facts stay explicit instead of being inferred from a model name or family.
SpecificationDeepSeek V4 FlashGPT-5.6 Sol
Context window
Maximum documented context; output-token limits may be lower.
DeepSeek V4 Flash
GPT-5.6 Sol
1.05M
OpenAI model catalogAPI model ID
DeepSeek V4 Flash
deepseek-v4-flash
DeepSeek V4 Flash 0731 updateGPT-5.6 Sol
gpt-5.6-sol
OpenAI model catalogCached-input rate
A missing cached-input rate falls back to the listed input rate only in the stated workload estimate.
DeepSeek V4 Flash
$0.0028 per 1M cached input tokens
GPT-5.6 Sol
$0.5 per 1M cached input tokens
OpenAI pricingDocumented inputs
DeepSeek V4 Flash
GPT-5.6 Sol
text, image
OpenAI model catalogDocumented outputs
DeepSeek V4 Flash
GPT-5.6 Sol
Provider availability
DeepSeek V4 Flash
Public Beta · DeepSeek API
DeepSeek V4 Flash 0731 updateGPT-5.6 Sol
Generally Available · OpenAI Responses API
OpenAI model catalogReasoning profile
DeepSeek V4 Flash
Non-Reasoning
GPT-5.6 Sol
Reasoning
Weight access
DeepSeek V4 Flash
Proprietary
GPT-5.6 Sol
Proprietary
License
DeepSeek V4 Flash
Proprietary
GPT-5.6 Sol
Proprietary
Release date
DeepSeek V4 Flash
2026-07-31
GPT-5.6 Sol
2026-07-09
If you already use one of these models
- Deployment change
- The models list different providers, so authentication, endpoint behavior, limits, and feature support may change.
- Quality signal
- At least one model is not scored in the current public ranking lane, so the page does not name an overall quality winner.
- Workload cost
- Repository review: $0.00784 vs $0.34. Cache-heavy agent loop: $0.00616 vs $0.5.
- Context tradeoff
- GPT-5.6 Sol has the larger documented window (1.05M).
Run the same representative tasks against both endpoints before changing production traffic.
Benchmark evidence
The full public result ledger is available for audit without forcing a wide desktop table onto a phone.
Browse raw public benchmark evidence40 rows
Agentic
Terminal-Bench 2.0
DeepSeek V4 Flash49.1%SourceGPT-5.6 Sol91.9%SourceGPT-5.6 Sol leads this result
MCP Atlas
DeepSeek V4 Flash64%SourceGPT-5.6 Sol—Not directly comparable
Toolathlon
DeepSeek V4 Flash40.7%SourceGPT-5.6 Sol58%SourceGPT-5.6 Sol leads this result
Claw-Eval
DeepSeek V4 Flash57.8%SourceGPT-5.6 Sol—Not directly comparable
Gert Labs
DeepSeek V4 Flash54.35%SourceGPT-5.6 Sol—Not directly comparable
BrowseComp
DeepSeek V4 Flash—GPT-5.6 Sol92.2%SourceNot directly comparable
OSWorld 2.0
DeepSeek V4 Flash—GPT-5.6 Sol62.6%SourceNot directly comparable
CyberGym
DeepSeek V4 Flash—GPT-5.6 Sol84.5%SourceNot directly comparable
ExploitGym
DeepSeek V4 Flash—GPT-5.6 Sol33.7%SourceNot directly comparable
Coding
LiveCodeBench Pass@1-COT
DeepSeek V4 Flash55.2%SourceGPT-5.6 Sol—Not directly comparable
SWE-bench Verified
DeepSeek V4 Flash73.7%SourceGPT-5.6 Sol—Not directly comparable
SWE-bench Pro
DeepSeek V4 Flash49.1%SourceGPT-5.6 Sol64.6%SourceGPT-5.6 Sol leads this result
SWE Multilingual
DeepSeek V4 Flash69.7%SourceGPT-5.6 Sol—Not directly comparable
Terminal-Bench 2.0
DeepSeek V4 Flash49.1%SourceGPT-5.6 Sol91.9%SourceGPT-5.6 Sol leads this result
deepSwe
DeepSeek V4 Flash—GPT-5.6 Sol72.7%SourceNot directly comparable
FrontierCode 1.1 Extended
DeepSeek V4 Flash—GPT-5.6 Sol60.6%SourceNot directly comparable
cursorBench32
DeepSeek V4 Flash—GPT-5.6 Sol67.2%SourceNot directly comparable
VulcanBench v3
DeepSeek V4 Flash—GPT-5.6 Sol87.0%SourceNot directly comparable
Reasoning
MRCR 1M
DeepSeek V4 Flash37.5%SourceGPT-5.6 Sol—Not directly comparable
CorpusQA 1M
DeepSeek V4 Flash15.5%SourceGPT-5.6 Sol—Not directly comparable
ARC-AGI-2
DeepSeek V4 Flash—GPT-5.6 Sol92.5%SourceNot directly comparable
ARC-AGI-3
DeepSeek V4 Flash—GPT-5.6 Sol7.8%SourceNot directly comparable
GeneBench-Pro
DeepSeek V4 Flash—GPT-5.6 Sol28.7%SourceNot directly comparable
Knowledge
MMLU-Pro
DeepSeek V4 Flash83%SourceGPT-5.6 Sol—Not directly comparable
SimpleQA
DeepSeek V4 Flash23.1%SourceGPT-5.6 Sol—Not directly comparable
Chinese-SimpleQA
DeepSeek V4 Flash71.5%SourceGPT-5.6 Sol—Not directly comparable
GPQA
DeepSeek V4 Flash71.2%SourceGPT-5.6 Sol94.6%SourceGPT-5.6 Sol leads this result
GPQA-D
DeepSeek V4 Flash71.2%SourceGPT-5.6 Sol94.6%SourceGPT-5.6 Sol leads this result
HLE
DeepSeek V4 Flash8.1%SourceGPT-5.6 Sol—Not directly comparable
HealthBench Professional
DeepSeek V4 Flash—GPT-5.6 Sol60.5%SourceNot directly comparable
HealthBench Hard
DeepSeek V4 Flash—GPT-5.6 Sol33.1%SourceNot directly comparable
Math
HMMT Feb 2026
DeepSeek V4 Flash40.8%SourceGPT-5.6 Sol—Not directly comparable
IMOAnswerBench
DeepSeek V4 Flash41.9%SourceGPT-5.6 Sol—Not directly comparable
Apex
DeepSeek V4 Flash1.0%SourceGPT-5.6 Sol—Not directly comparable
Apex Shortlist
DeepSeek V4 Flash9.3%SourceGPT-5.6 Sol—Not directly comparable
FrontierMath (legacy)
DeepSeek V4 Flash—GPT-5.6 Sol89%SourceNot directly comparable
FrontierMath v2 (Tiers 1-3)
DeepSeek V4 Flash—GPT-5.6 Sol89.000%SourceNot directly comparable
FrontierMath v2 (Tier 4)
DeepSeek V4 Flash—GPT-5.6 Sol83.000%SourceNot directly comparable
Multimodal
Frequently asked questions
Which is better, DeepSeek V4 Flash or GPT-5.6 Sol?
At least one model is not scored in the current public ranking lane, so the page does not name an overall quality winner. The page therefore keeps the decision tied to the specific documented workload.
Which is better for coding, DeepSeek V4 Flash or GPT-5.6 Sol?
The current coding averages use different weighted benchmark sets, so BenchLM does not name a winner from them. Read the shared benchmark rows directly and test the models on the same task set.
Which is better for agentic tasks, DeepSeek V4 Flash or GPT-5.6 Sol?
The current agentic tasks averages use different weighted benchmark sets, so BenchLM does not name a winner from them. Read the shared benchmark rows directly and test the models on the same task set.
Which costs less, DeepSeek V4 Flash or GPT-5.6 Sol?
For the stated presets, chat costs $0.00028 on DeepSeek V4 Flash and $0.02 on GPT-5.6 Sol; repository review costs $0.00784 and $0.34; the cache-heavy agent loop costs $0.00616 and $0.5. Costs use the listed standard API rates.
Which has the larger context window, DeepSeek V4 Flash or GPT-5.6 Sol?
GPT-5.6 Sol has the larger documented context window: 1.05M, compared with 1M.
Related comparisons
Last updated August 10, 2026
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