Agentic
Like-for-like- DeepSeek V4 Flash
- 49.1
- Hy3 Preview
- 54.4
- Weighted basis
- 1 vs 1 rows
- Reading
- Hy3 Preview leads
Model comparison
DeepSeek V4 Flash vs Hy3 Preview
Updated August 7, 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.
Agentic work
Tool use, computer use, and multi-step task completion
Hy3 Preview
Hy3 Preview leads on the same 1 weighted benchmark row.
Confidence: limited
Long documents
Prompts that approach the documented context limit
DeepSeek V4 Flash
DeepSeek V4 Flash has the larger documented context window.
Confidence: documented
Show secondary and unsupported calls
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
Chat turn cost
1K fresh input + 500 output tokens
Not enough matched evidence
A complete comparable API-rate estimate is not available for both models.
Confidence: listed-rates
Cache-heavy agent loop cost
200K cached + 20K fresh input + 10K output tokens
Not enough matched evidence
A complete comparable API-rate estimate is not available for both models.
Confidence: listed-rates
Repository review cost
50K fresh input + 3K output tokens
Not enough matched evidence
A complete comparable API-rate estimate is not available for both models.
Confidence: listed-rates
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
- Shared results
- 6
- DeepSeek V4 Flash only
- 16
- Hy3 Preview only
- 0
- Like-for-like categories
- 1 / 8
2 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
- Hy3 Preview
- 74.4
- Weighted basis
- 2 vs 1 rows
- Reading
- Directional only
Knowledge
Directional only- DeepSeek V4 Flash
- 38.8
- Hy3 Preview
- 87.2
- Weighted basis
- 4 vs 1 rows
- Reading
- Directional only
Reasoning
Not comparable- DeepSeek V4 Flash
- Not measured
- Hy3 Preview
- Not measured
- Weighted basis
- 0 vs 0 rows
- Reading
- Not comparable
Math
Not comparable- DeepSeek V4 Flash
- 40.8
- Hy3 Preview
- Not measured
- Weighted basis
- 1 vs 0 rows
- Reading
- Not comparable
Multilingual
Not comparable- DeepSeek V4 Flash
- Not measured
- Hy3 Preview
- Not measured
- Weighted basis
- 0 vs 0 rows
- Reading
- Not comparable
Multimodal
Not comparable- DeepSeek V4 Flash
- Not measured
- Hy3 Preview
- Not measured
- Weighted basis
- 0 vs 0 rows
- Reading
- Not comparable
Instruction following
Not comparable- DeepSeek V4 Flash
- Not measured
- Hy3 Preview
- Not measured
- Weighted basis
- 0 vs 0 rows
- Reading
- Not comparable
| Category | DeepSeek V4 Flash | Hy3 Preview | Weighted basis | Reading |
|---|---|---|---|---|
| Agentic | 49.1 | 54.4 | Like-for-like1 vs 1 rows | Hy3 Preview leads |
| Coding | 64.2 | 74.4 | Directional only2 vs 1 rows | Directional only |
| Knowledge | 38.8 | 87.2 | Directional only4 vs 1 rows | Directional only |
| Reasoning | Not measured | Not measured | Not comparable0 vs 0 rows | Not comparable |
| Math | 40.8 | Not measured | Not comparable1 vs 0 rows | Not comparable |
| Multilingual | Not measured | Not measured | Not comparable0 vs 0 rows | Not comparable |
| Multimodal | Not measured | Not measured | Not comparable0 vs 0 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.
GPQA
Knowledge
DeepSeek V4 Flash: 71.2%Hy3 Preview: 87.2%Normalized gap 16.0DeepSeek V4 Flash source Hy3 Preview sourceTerminal-Bench 2.0
Agentic
DeepSeek V4 Flash: 49.1%Hy3 Preview: 54.4%Normalized gap 5.3DeepSeek V4 Flash source Hy3 Preview sourceSWE-bench Verified
Coding
DeepSeek V4 Flash: 73.7%Hy3 Preview: 74.4%Normalized gap 0.7DeepSeek V4 Flash source Hy3 Preview 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
- Hy3 Preview
- Self-hosted; infrastructure cost varies
- Fits in one request
Hy3 Preview has no comparable published API token rate.
Repository review
50K fresh input + 3K output tokens
- DeepSeek V4 Flash
- $0.00784
- Fits in one request
- Hy3 Preview
- Self-hosted; infrastructure cost varies
- Fits in one request
Hy3 Preview has no comparable published API token rate.
Cache-heavy agent loop
200K cached + 20K fresh input + 10K output tokens
- DeepSeek V4 Flash
- $0.00616
- Fits in one request
- Hy3 Preview
- Self-hosted; infrastructure cost varies
- Fits in one request
- Cached-input rate unavailable
Hy3 Preview has no comparable published API token rate.
Specification differences
Sourced differences are shown directly. Missing facts stay explicit instead of being inferred from a model name or family.
SpecificationDeepSeek V4 FlashHy3 Preview
Context window
Maximum documented context; output-token limits may be lower.
DeepSeek V4 Flash
Hy3 Preview
256K
API model ID
DeepSeek V4 Flash
deepseek-v4-flash
DeepSeek V4 Flash 0731 updateHy3 Preview
Not sourced
Cached-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
Hy3 Preview
No comparable hosted API rate
Documented inputs
DeepSeek V4 Flash
Hy3 Preview
Not sourced
Documented outputs
DeepSeek V4 Flash
Hy3 Preview
Not sourced
Provider availability
DeepSeek V4 Flash
Public Beta · DeepSeek API
DeepSeek V4 Flash 0731 updateHy3 Preview
Not sourced
Reasoning profile
DeepSeek V4 Flash
Non-Reasoning
Hy3 Preview
Reasoning
Weight access
DeepSeek V4 Flash
Proprietary
Hy3 Preview
Open Weight
License
DeepSeek V4 Flash
Proprietary
Hy3 Preview
Open Weight
Release date
DeepSeek V4 Flash
2026-07-31
Hy3 Preview
2026-04-23
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
- A complete comparable API-rate estimate is not available for both models.
- Context tradeoff
- DeepSeek V4 Flash has the larger documented window (1M).
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 evidence22 rows
Agentic
Terminal-Bench 2.0
DeepSeek V4 Flash49.1%SourceHy3 Preview54.4%SourceHy3 Preview leads this result
MCP Atlas
DeepSeek V4 Flash64%SourceHy3 Preview—Not directly comparable
Toolathlon
DeepSeek V4 Flash40.7%SourceHy3 Preview—Not directly comparable
Claw-Eval
DeepSeek V4 Flash57.8%SourceHy3 Preview—Not directly comparable
Gert Labs
Shared sourceDeepSeek V4 Flash54.35%Hy3 Preview36.91%DeepSeek V4 Flash leads this result
Coding
LiveCodeBench Pass@1-COT
DeepSeek V4 Flash55.2%SourceHy3 Preview—Not directly comparable
SWE-bench Verified
DeepSeek V4 Flash73.7%SourceHy3 Preview74.4%SourceHy3 Preview leads this result
SWE-bench Pro
DeepSeek V4 Flash49.1%SourceHy3 Preview—Not directly comparable
SWE Multilingual
DeepSeek V4 Flash69.7%SourceHy3 Preview—Not directly comparable
Terminal-Bench 2.0
DeepSeek V4 Flash49.1%SourceHy3 Preview54.4%SourceHy3 Preview leads this result
Reasoning
Knowledge
MMLU-Pro
DeepSeek V4 Flash83%SourceHy3 Preview—Not directly comparable
SimpleQA
DeepSeek V4 Flash23.1%SourceHy3 Preview—Not directly comparable
Chinese-SimpleQA
DeepSeek V4 Flash71.5%SourceHy3 Preview—Not directly comparable
GPQA
DeepSeek V4 Flash71.2%SourceHy3 Preview87.2%SourceHy3 Preview leads this result
GPQA-D
DeepSeek V4 Flash71.2%SourceHy3 Preview87.2%SourceHy3 Preview leads this result
HLE
DeepSeek V4 Flash8.1%SourceHy3 Preview—Not directly comparable
Math
Frequently asked questions
Which is better, DeepSeek V4 Flash or Hy3 Preview?
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 Hy3 Preview?
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 Hy3 Preview?
Hy3 Preview leads the like-for-like agentic tasks comparison across 1 shared weighted benchmark row.
Which costs less, DeepSeek V4 Flash or Hy3 Preview?
Both models do not have comparable published API token rates, so this page does not name a universal price winner.
Which has the larger context window, DeepSeek V4 Flash or Hy3 Preview?
DeepSeek V4 Flash has the larger documented context window: 1M, compared with 256K.
Related comparisons
Last updated August 7, 2026
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