Claude Opus 4.6 vs DeepSeek V4 Flash Vision Exp
Updated October 21, 2026. 4 benchmarks have a result for both. Coding is ranked on the Vibe Coding Index; every other board is shown as published.
Decision reading
Claude Opus 4.6 scores 66.9 and DeepSeek V4 Flash Vision Exp 37.6 on the Vibe Coding Index, but no coding benchmark measured both, so the gap is directional, not a ranking.
Pick Claude Opus 4.6 when the benchmark that matters is Humanity's Last Exam (Artificial Analysis run), where it leads; pick DeepSeek V4 Flash Vision Exp when output tokens cost 38.7x less, or when the context window is larger, 1.05M against 1M tokens.
- Shared results
- 4
- Claude Opus 4.6 only
- 104
- DeepSeek V4 Flash Vision Exp only
- 10
- Like-for-like categories
- 3 of 9
Shared results can support a head-to-head reading. Results only one model has describe coverage, not superiority.
Which one for your work
Each card is decided by one number both models carry. Where only one has it, the card says so and makes no call.
Coding
Vibe Coding Index, four public coding benchmarks
No call
66.9 against 37.6, from different benchmarks with none in common.
Directional only
Intelligence
AA Intelligence Index
DeepSeek V4 Flash Vision Exp
DeepSeek V4 Flash Vision Exp leads, 34.8 against 31.9.
Same board, both measured
Agentic work
AA Agentic Index
No call
Only DeepSeek V4 Flash Vision Exp has a AA Agentic Index result, 47.5.
Directional only
Reasoning
GPQA Diamond
No call
Only Claude Opus 4.6 has a GPQA Diamond result, 89.7%.
Directional only
Math
AIME
No call
Only Claude Opus 4.6 has a AIME result, 95.6%.
Directional only
Knowledge
MMLU Pro
No call
Only Claude Opus 4.6 has a MMLU Pro result, 89.1%.
Directional only
Web design
Design Arena: websites
No call
Only Claude Opus 4.6 has a Design Arena: websites result, 1291.
Directional only
Long documents
Listed context window
DeepSeek V4 Flash Vision Exp
DeepSeek V4 Flash Vision Exp takes 1.05M tokens against 1M.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
DeepSeek V4 Flash Vision Exp
Claude Opus 4.6 $0.018, DeepSeek V4 Flash Vision Exp $0.0005 per turn.
List prices
Cost per solved task
One SWE-bench Verified task, solved
No call
Only Claude Opus 4.6 has the number, $1.56.
Directional only
At a glance
- Coding index
- Claude Opus 4.6 66.9 from 2 benchmarks, DeepSeek V4 Flash Vision Exp 37.6 from 1 benchmark.
- Widest category
- Reasoning, 3.5 points apart on average over 2 shared benchmarks.
- Widest single gap
- Humanity's Last Exam (Artificial Analysis run): Claude Opus 4.6 39.9% against DeepSeek V4 Flash Vision Exp 34.5%, 5.4 points apart on a 0 to 100 scale.
- Output price
- Claude Opus 4.6 $25.00 against DeepSeek V4 Flash Vision Exp $0.6468 per million output tokens, 38.7x apart.
- Context window
- Claude Opus 4.6 takes 1M tokens, DeepSeek V4 Flash Vision Exp 1.05M.
Benchmark by benchmark
First the score: boards each model leads, per category, where both have a result. Then every board, a category to a fold; bars are each result on a 0 to 100 scale, so compare the two in a row, not one row with another.
| Category | Claude Opus 4.6 | Bars | DeepSeek V4 Flash Vision Exp | Ties |
|---|---|---|---|---|
| Intelligence | 0 | 1 | ||
| Reasoning | 1 | 1 | ||
| General | 0 | 1 | ||
| All shared boards | 1 | 3 |
CodingDirectional onlyFour of these boards feed the Vibe Coding Index20 boards, none shared
| Benchmark | Claude Opus 4.6 | DeepSeek V4 Flash Vision Exp | Leader |
|---|---|---|---|
| SWE-bench Verified | 75.6% | Not measured | Only Claude Opus 4.6 measured |
| SWE-bench Multilingual | 72.0% | Not measured | Only Claude Opus 4.6 measured |
| LiveBench coding | Not measured | 37.6% | Only DeepSeek V4 Flash Vision Exp measured |
| LMArena WebDev | 1547 | Not measured | Only Claude Opus 4.6 measured |
| AA Coding Index | Not measured | 65.0 | Only DeepSeek V4 Flash Vision Exp measured |
| LiveCodeBench (Vals AI) | 84.7% | Not measured | Only Claude Opus 4.6 measured |
| SWE-bench Verified (Vals AI) | 78.2% | Not measured | Only Claude Opus 4.6 measured |
| Vibe Code Bench (Vals AI) | 57.6% | Not measured | Only Claude Opus 4.6 measured |
| SciCode | Not measured | 49.7% | Only DeepSeek V4 Flash Vision Exp measured |
| Terminal-Bench Hard (Artificial Analysis run) | 48.5% | Not measured | Only Claude Opus 4.6 measured |
| Terminal-Bench | 79.8% | Not measured | Only Claude Opus 4.6 measured |
| FrontierCode | 26.6% | Not measured | Only Claude Opus 4.6 measured |
| GSO-Bench | 41.2% | Not measured | Only Claude Opus 4.6 measured |
| WeirdML | 78.0% | Not measured | Only Claude Opus 4.6 measured |
| Cybench | 93.0% | Not measured | Only Claude Opus 4.6 measured |
| LMArena Text: coding | 1534 | Not measured | Only Claude Opus 4.6 measured |
| LMArena Text: software and IT | 1527 | Not measured | Only Claude Opus 4.6 measured |
| LMArena WebDev: React | 1539 | Not measured | Only Claude Opus 4.6 measured |
| LMArena WebDev: HTML | 1559 | Not measured | Only Claude Opus 4.6 measured |
| LMArena WebDev: from an image | 1543 | Not measured | Only Claude Opus 4.6 measured |
| Neither model has a result on the other 18 boards here | |||
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index01
| Benchmark | Claude Opus 4.6 | DeepSeek V4 Flash Vision Exp | Leader |
|---|---|---|---|
| AA Intelligence Index | 31.9 | 34.8 | DeepSeek V4 Flash Vision Exp |
| Epoch Capabilities Index | 155.7 | Not measured | Only Claude Opus 4.6 measured |
Agentic workDirectional onlyPublic boards, shown as published, kept out of the index15 boards, none shared
| Benchmark | Claude Opus 4.6 | DeepSeek V4 Flash Vision Exp | Leader |
|---|---|---|---|
| AA Agentic Index | Not measured | 47.5 | Only DeepSeek V4 Flash Vision Exp measured |
| Design Arena: agents building web apps | 1206 | Not measured | Only Claude Opus 4.6 measured |
| Design Arena: agents building full-stack apps | 1220 | Not measured | Only Claude Opus 4.6 measured |
| Design Arena: agents building mobile apps | 1207 | Not measured | Only Claude Opus 4.6 measured |
| Design Arena: agents building Android apps | 1204 | Not measured | Only Claude Opus 4.6 measured |
| Design Arena: agents building games | 1214 | Not measured | Only Claude Opus 4.6 measured |
| LiveBench research | Not measured | 69.2% | Only DeepSeek V4 Flash Vision Exp measured |
| LiveBench browser | Not measured | 64.0% | Only DeepSeek V4 Flash Vision Exp measured |
| LiveBench long agentic | Not measured | 39.0% | Only DeepSeek V4 Flash Vision Exp measured |
| τ²-Bench Telecom | 92.1% | Not measured | Only Claude Opus 4.6 measured |
| APEX-Agents | 46.3% | Not measured | Only Claude Opus 4.6 measured |
| METR time horizons | 78.9% | Not measured | Only Claude Opus 4.6 measured |
| Remote Labor Index | 4.2% | Not measured | Only Claude Opus 4.6 measured |
| DeepResearch Bench | 55.3% | Not measured | Only Claude Opus 4.6 measured |
| Vending-Bench 2 | $8,018 | Not measured | Only Claude Opus 4.6 measured |
| Neither model has a result on the other 24 boards here | |||
ReasoningLike-for-likePublic boards, shown as published, kept out of the index11
| Benchmark | Claude Opus 4.6 | DeepSeek V4 Flash Vision Exp | Leader |
|---|---|---|---|
| GPQA Diamond | 89.7% | Not measured | Only Claude Opus 4.6 measured |
| LiveBench reasoning | Not measured | 85.4% | Only DeepSeek V4 Flash Vision Exp measured |
| MMMU Pro (Vals AI) | 83.9% | Not measured | Only Claude Opus 4.6 measured |
| GPQA Diamond (Artificial Analysis run) | 89.6% | 91.3% | DeepSeek V4 Flash Vision Exp |
| Humanity's Last Exam (Artificial Analysis run) | 39.9% | 34.5% | Claude Opus 4.6 |
| GPQA Diamond (Epoch AI run) | 90.5% | Not measured | Only Claude Opus 4.6 measured |
| ARC-AGI | 94.0% | Not measured | Only Claude Opus 4.6 measured |
| ARC-AGI-2 | 69.2% | Not measured | Only Claude Opus 4.6 measured |
| SimpleBench | 67.6% | Not measured | Only Claude Opus 4.6 measured |
| Chess puzzles | 21.0% | Not measured | Only Claude Opus 4.6 measured |
| Mystery game puzzles | 25.0% | Not measured | Only Claude Opus 4.6 measured |
| EBR-bench | 12.7% | Not measured | Only Claude Opus 4.6 measured |
| LMArena Text: hard prompts | 1525 | Not measured | Only Claude Opus 4.6 measured |
| LMArena Text: expert | 1544 | Not measured | Only Claude Opus 4.6 measured |
| LMArena Text: hard prompts in English | 1530 | Not measured | Only Claude Opus 4.6 measured |
| LMArena Vision: diagrams | 1340 | Not measured | Only Claude Opus 4.6 measured |
| LMArena Vision: homework | 1337 | Not measured | Only Claude Opus 4.6 measured |
| Neither model has a result on the other 4 boards here | |||
MathDirectional onlyPublic boards, shown as published, kept out of the index7 boards, none shared
| Benchmark | Claude Opus 4.6 | DeepSeek V4 Flash Vision Exp | Leader |
|---|---|---|---|
| AIME | 95.6% | Not measured | Only Claude Opus 4.6 measured |
| OTIS Mock AIME | 94.4% | Not measured | Only Claude Opus 4.6 measured |
| FrontierMath, tiers 1 to 3 | 66.0% | Not measured | Only Claude Opus 4.6 measured |
| FrontierMath, tier 4 | 26.8% | Not measured | Only Claude Opus 4.6 measured |
| ProofBench | 50.0% | Not measured | Only Claude Opus 4.6 measured |
| LMArena Text: math | 1518 | Not measured | Only Claude Opus 4.6 measured |
| LMArena Text: mathematical work | 1525 | Not measured | Only Claude Opus 4.6 measured |
| Neither model has a result on the other 6 boards here | |||
KnowledgeDirectional onlyPublic boards, shown as published, kept out of the index13 boards, none shared
| Benchmark | Claude Opus 4.6 | DeepSeek V4 Flash Vision Exp | Leader |
|---|---|---|---|
| MMLU Pro | 89.1% | Not measured | Only Claude Opus 4.6 measured |
| LegalBench (Vals AI) | 85.3% | Not measured | Only Claude Opus 4.6 measured |
| CaseLaw (Vals AI) | 62.1% | Not measured | Only Claude Opus 4.6 measured |
| CorpFin (Vals AI) | 67.0% | Not measured | Only Claude Opus 4.6 measured |
| TaxEval (Vals AI) | 76.0% | Not measured | Only Claude Opus 4.6 measured |
| MortgageTax (Vals AI) | 68.5% | Not measured | Only Claude Opus 4.6 measured |
| MedQA (Vals AI) | 95.4% | Not measured | Only Claude Opus 4.6 measured |
| MedCode (Vals AI) | 49.1% | Not measured | Only Claude Opus 4.6 measured |
| SimpleQA Verified | 47.0% | Not measured | Only Claude Opus 4.6 measured |
| LMArena Text: science | 1519 | Not measured | Only Claude Opus 4.6 measured |
| LMArena Text: medicine and healthcare | 1504 | Not measured | Only Claude Opus 4.6 measured |
| LMArena Text: legal and government | 1512 | Not measured | Only Claude Opus 4.6 measured |
| LMArena Text: business and finance | 1497 | Not measured | Only Claude Opus 4.6 measured |
| Neither model has a result on the other 4 boards here | |||
Web designDirectional onlyPublic boards, shown as published, kept out of the index9 boards, none shared
| Benchmark | Claude Opus 4.6 | DeepSeek V4 Flash Vision Exp | Leader |
|---|---|---|---|
| Design Arena: websites | 1291 | Not measured | Only Claude Opus 4.6 measured |
| Design Arena: UI components | 1284 | Not measured | Only Claude Opus 4.6 measured |
| Design Arena: game dev | 1278 | Not measured | Only Claude Opus 4.6 measured |
| Design Arena: data viz | 1279 | Not measured | Only Claude Opus 4.6 measured |
| Design Arena: 3D | 1274 | Not measured | Only Claude Opus 4.6 measured |
| Design Arena: all code categories | 1289 | Not measured | Only Claude Opus 4.6 measured |
| Design Arena: SVG | 1227 | Not measured | Only Claude Opus 4.6 measured |
| Design Arena: ASCII art | 1254 | Not measured | Only Claude Opus 4.6 measured |
| LiveBench design | Not measured | 70.7% | Only DeepSeek V4 Flash Vision Exp measured |
GeneralLike-for-likePublic boards, shown as published, kept out of the index01
| Benchmark | Claude Opus 4.6 | DeepSeek V4 Flash Vision Exp | Leader |
|---|---|---|---|
| LiveBench data analysis | Not measured | 79.5% | Only DeepSeek V4 Flash Vision Exp measured |
| SAGE (Vals AI) | 51.6% | Not measured | Only Claude Opus 4.6 measured |
| MedScribe (Vals AI) | 86.7% | Not measured | Only Claude Opus 4.6 measured |
| IFBench | 53.1% | Not measured | Only Claude Opus 4.6 measured |
| Long context reasoning (AA-LCR) | 78.0% | 81.3% | DeepSeek V4 Flash Vision Exp |
| DTBench | 91.2% | Not measured | Only Claude Opus 4.6 measured |
| LMCA | 55.8% | Not measured | Only Claude Opus 4.6 measured |
| CL-bench | 20.7% | Not measured | Only Claude Opus 4.6 measured |
| Furniture assembly | 28.3% | Not measured | Only Claude Opus 4.6 measured |
| CL-bench Life | 17.0% | Not measured | Only Claude Opus 4.6 measured |
| LMArena Text | 1501 | Not measured | Only Claude Opus 4.6 measured |
| LMArena Text: instruction following | 1521 | Not measured | Only Claude Opus 4.6 measured |
| LMArena Text: creative writing | 1505 | Not measured | Only Claude Opus 4.6 measured |
| LMArena Vision | 1316 | Not measured | Only Claude Opus 4.6 measured |
| LMArena Text: English | 1511 | Not measured | Only Claude Opus 4.6 measured |
| LMArena Text: non-English | 1488 | Not measured | Only Claude Opus 4.6 measured |
| LMArena Text: Chinese | 1551 | Not measured | Only Claude Opus 4.6 measured |
| LMArena Text: German | 1500 | Not measured | Only Claude Opus 4.6 measured |
| LMArena Text: Japanese | 1488 | Not measured | Only Claude Opus 4.6 measured |
| LMArena Text: Korean | 1464 | Not measured | Only Claude Opus 4.6 measured |
| LMArena Text: French | 1512 | Not measured | Only Claude Opus 4.6 measured |
| LMArena Text: Spanish | 1510 | Not measured | Only Claude Opus 4.6 measured |
| LMArena Text: Russian | 1497 | Not measured | Only Claude Opus 4.6 measured |
| LMArena Text: Polish | 1499 | Not measured | Only Claude Opus 4.6 measured |
| LMArena Text: multi-turn | 1511 | Not measured | Only Claude Opus 4.6 measured |
| LMArena Text: longer queries | 1518 | Not measured | Only Claude Opus 4.6 measured |
| LMArena Text: writing and language | 1502 | Not measured | Only Claude Opus 4.6 measured |
| LMArena Text: entertainment and media | 1492 | Not measured | Only Claude Opus 4.6 measured |
| LMArena Vision: English | 1324 | Not measured | Only Claude Opus 4.6 measured |
| LMArena Vision: Chinese | 1370 | Not measured | Only Claude Opus 4.6 measured |
| LMArena Vision: reading text | 1326 | Not measured | Only Claude Opus 4.6 measured |
| LMArena Vision: humor | 1314 | Not measured | Only Claude Opus 4.6 measured |
| LMArena Vision: recognizing things | 1274 | Not measured | Only Claude Opus 4.6 measured |
| LMArena Vision: creative writing | 1331 | Not measured | Only Claude Opus 4.6 measured |
| LMArena Document | 1507 | Not measured | Only Claude Opus 4.6 measured |
| Neither model has a result on the other 11 boards here | |||
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
| Benchmark | Claude Opus 4.6 | DeepSeek V4 Flash Vision Exp | Leader |
|---|---|---|---|
| Neither model has a result on 5 boards here | |||
What each workload costs
Three fixed token mixes at each model's listed price, so per-token rates become a bill.
Chat turn
1K input + 500 output tokens
DeepSeek V4 Flash Vision Exp costs less
Repository review
50K input + 3K output tokens
DeepSeek V4 Flash Vision Exp costs less
Agent loop
200K input + 10K output tokens
DeepSeek V4 Flash Vision Exp costs less
Listed OpenRouter rates, without cache or batch discounts. A workload that does not fit a model's context window would need splitting.
Specification differences
The leading value in a row is marked; a row with a missing value names no leader. Our two rows are marked in red.
| Specification | Anthropic Claude Opus 4.6 | DeepSeek V4 Flash Vision Exp |
|---|---|---|
| Maker | Anthropic | DeepSeek |
| Weights | No public weights listed | Open weights |
| Released | February 4, 2026 | August 21, 2026 |
| Context window | 1M | 1.05M |
| Input $/Mtok | $5.00 | $0.2156 |
| Output $/Mtok | $25.00 | $0.6468 |
| Coding index | 66.9 | 37.6 |
| Independent measurements behind it | 2 | 1 |
| Cost per solved task | $1.56 | Not computable |
| Source | OpenRouter listing | OpenRouter listing |
Questions
Is Claude Opus 4.6 better than DeepSeek V4 Flash Vision Exp for coding?
Claude Opus 4.6 scores 66.9 and DeepSeek V4 Flash Vision Exp 37.6 on the Vibe Coding Index, but no coding benchmark measured both, so the gap is directional, not a ranking. Pick Claude Opus 4.6 when the benchmark that matters is Humanity's Last Exam (Artificial Analysis run), where it leads; pick DeepSeek V4 Flash Vision Exp when output tokens cost 38.7x less, or when the context window is larger, 1.05M against 1M tokens.
Which is cheaper, Claude Opus 4.6 or DeepSeek V4 Flash Vision Exp?
Claude Opus 4.6 costs $5.00 per million input tokens and $25.00 per million output tokens; DeepSeek V4 Flash Vision Exp costs $0.2156 and $0.6468. Cost per solved task is known for Claude Opus 4.6 only.
Which has the bigger context window, Claude Opus 4.6 or DeepSeek V4 Flash Vision Exp?
DeepSeek V4 Flash Vision Exp, with 1.05M tokens against 1M.
How many benchmarks is the Claude Opus 4.6 vs DeepSeek V4 Flash Vision Exp comparison based on?
4 benchmarks have a result for both models as of October 21, 2026. Claude Opus 4.6's coding index rests on 2 independent benchmarks and DeepSeek V4 Flash Vision Exp's on 1. Where only one model has a result, the page says so instead of naming a winner.