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Claude Opus 5.5 vs DeepSeek-V4-Flash-Vision-Exp

Claude Opus 5.5 leads the LLM Stats Score 60.5 to 44.7. DeepSeek-V4-Flash-Vision-Exp is 24.2x cheaper per token.

Anthropic · DeepSeek · Updated for 2026

Which is better?

Claude Opus 5.5 leads the overall LLM Stats Score 60.5 to 44.7, ranking #1 overall.

In the 1 individual benchmarks reported for both models, Claude Opus 5.5 wins 1; this is a narrower head-to-head signal than the composite indexes.

On price, DeepSeek-V4-Flash-Vision-Exp is roughly 24.2x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

DeepSeek-V4-Flash-Vision-Exp also accepts a larger context window (1,048,576 input tokens), making it the stronger choice for long documents and large codebases.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose Claude Opus 5.5

  • overall performance matters — it scores 60.5 and ranks #1 on LLM Stats
  • your work emphasizes reasoning and coding — it leads those capability indexes
  • you value its reported benchmark strengths — it wins 1 of 1 exact shared results
  • you want the most recent training data — it shipped Sep 2026

Choose DeepSeek-V4-Flash-Vision-Exp

  • cost matters — it's about 24.2x cheaper per token
  • you process long inputs — it offers a 1,048,576 token context window

At a glance

The differences that matter most.

Claude Opus 5.5
Anthropic
DeepSeek-V4-Flash-Vision-Exp
DeepSeek
Core performance indexes
LLM Stats Score
60.5
#1
44.7
#39
Reasoning
59.1
#1
41.1
#58
Coding
51.3
#1
33.8
#39
Agents
45.5
#1
31.0
#37
Cost, coverage & limits
Benchmark wins
1 of 1
0 of 1
Input price
$4.00 / M
$0.22 / M
Output price
$20.00 / M
$0.66 / M
Context window
1,000,000
1,048,576

Capability indexes

Additional strengths measured across groups of related public benchmarks

1 shared
Index
Claude Opus 5.5
DeepSeek-V4-Flash-Vision-Exp
Tool use
32.4#3
21.3#54
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

31 reported for Claude Opus 5.5 · 7 for DeepSeek-V4-Flash-Vision-Exp

1 shared

Claude Opus 5.5 outperforms in 1 benchmarks (AutomationBench), while DeepSeek-V4-Flash-Vision-Exp is better at 0 benchmarks.

Claude Opus 5.5 significantly outperforms across most benchmarks.

Wed Oct 07 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Pricing Analysis

Price comparison per million tokens

DeepSeek-V4-Flash-Vision-Exp costs less

For input processing, Claude Opus 5.5 ($4.00/1M tokens) is 18.2x more expensive than DeepSeek-V4-Flash-Vision-Exp ($0.22/1M tokens).

For output processing, Claude Opus 5.5 ($20.00/1M tokens) is 30.3x more expensive than DeepSeek-V4-Flash-Vision-Exp ($0.66/1M tokens).

In conclusion, Claude Opus 5.5 is more expensive than DeepSeek-V4-Flash-Vision-Exp.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Wed Oct 07 2026 • llm-stats.com
Anthropic
Claude Opus 5.5
Input tokens$4.00
Output tokens$20.00
Best providerAnthropic
DeepSeek
DeepSeek-V4-Flash-Vision-Exp
Input tokens$0.22
Output tokens$0.66
Best providerDeepSeek
Notice missing or incorrect data?

Context Window

Maximum input and output token capacity

DeepSeek-V4-Flash-Vision-Exp accepts 1,048,576 input tokens compared to Claude Opus 5.5's 1,000,000 tokens. DeepSeek-V4-Flash-Vision-Exp can generate longer responses up to 393,216 tokens, while Claude Opus 5.5 is limited to 128,000 tokens.

Anthropic
Claude Opus 5.5
Input1,000,000 tokens
Output128,000 tokens
DeepSeek
DeepSeek-V4-Flash-Vision-Exp
Input1,048,576 tokens
Output393,216 tokens
Wed Oct 07 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both Claude Opus 5.5 and DeepSeek-V4-Flash-Vision-Exp support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

Claude Opus 5.5

Text
Images
Audio
Video

DeepSeek-V4-Flash-Vision-Exp

Text
Images
Audio
Video

Release Timeline

When each model was launched

Claude Opus 5.5 was released on 2026-09-22, while DeepSeek-V4-Flash-Vision-Exp was released on 2026-08-21.

Claude Opus 5.5 is 1 month newer than DeepSeek-V4-Flash-Vision-Exp.

Claude Opus 5.5

Sep 22, 2026

2 weeks ago

1mo newer
DeepSeek-V4-Flash-Vision-Exp

Aug 21, 2026

1 months ago

Knowledge Cutoff

When training data ends

Claude Opus 5.5 has a documented knowledge cutoff of 2026-06-01, while DeepSeek-V4-Flash-Vision-Exp's cutoff date is not specified.

We can confirm Claude Opus 5.5's training data extends to 2026-06-01, but cannot make a direct comparison without DeepSeek-V4-Flash-Vision-Exp's cutoff date.

Claude Opus 5.5

Jun 2026

DeepSeek-V4-Flash-Vision-Exp

—

Provider Availability

Claude Opus 5.5 is available from Anthropic. DeepSeek-V4-Flash-Vision-Exp is available from DeepSeek, DeepInfra.

Claude Opus 5.5

anthropic logo
Anthropic
Input Price:Input: $4.00/1MOutput Price:Output: $20.00/1M

DeepSeek-V4-Flash-Vision-Exp

deepseek logo
DeepSeek
Input Price:Input: $0.22/1MOutput Price:Output: $0.66/1M
deepinfra logo
Deepinfra
Input Price:Input: $0.44/1MOutput Price:Output: $1.32/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?

Judge for yourself.

Run your own prompts against Claude Opus 5.5 and DeepSeek-V4-Flash-Vision-Exp side-by-side, then vote on the output you prefer.

Claude Opus 5.5
✓ Preferred
DeepSeek-V4-Flash-Vision-Exp
Open in Playground

FAQ

Common questions about Claude Opus 5.5 vs DeepSeek-V4-Flash-Vision-Exp.

Which is better, Claude Opus 5.5 or DeepSeek-V4-Flash-Vision-Exp?

Claude Opus 5.5 leads the LLM Stats Score 60.5 to 44.7. Claude Opus 5.5 is made by Anthropic and DeepSeek-V4-Flash-Vision-Exp is made by DeepSeek. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Claude Opus 5.5 compare to DeepSeek-V4-Flash-Vision-Exp in benchmarks?

Claude Opus 5.5 scores BenchCAD (with Python tool): 96.2%, Global-MMLU: 94.3%, SWE-bench Multilingual: 93.9%, MILU: 93.1%, ArXivMath: 91.2%. DeepSeek-V4-Flash-Vision-Exp scores Terminal-Bench 2.1: 83.9%, DSBench-Hard: 63.6%, DeepSWE: 59.3%, NL2Repo: 57.7%, ZEROBench: 35.0%.

Is Claude Opus 5.5 cheaper than DeepSeek-V4-Flash-Vision-Exp?

DeepSeek-V4-Flash-Vision-Exp is 18.2x cheaper for input tokens. Claude Opus 5.5 costs $4.00/M input and $20.00/M output via anthropic. DeepSeek-V4-Flash-Vision-Exp costs $0.22/M input and $0.66/M output via deepseek.

What are the context window sizes for Claude Opus 5.5 and DeepSeek-V4-Flash-Vision-Exp?

Claude Opus 5.5 supports 1.0M tokens and DeepSeek-V4-Flash-Vision-Exp supports 1.0M tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Claude Opus 5.5 and DeepSeek-V4-Flash-Vision-Exp?

Key differences include LLM Stats Score (60.5 vs 44.7), context window (1.0M vs 1.0M), input pricing ($4.00 vs $0.22/M), licensing (Proprietary vs Unknown). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Opus 5.5 and DeepSeek-V4-Flash-Vision-Exp?

Claude Opus 5.5 is developed by Anthropic and DeepSeek-V4-Flash-Vision-Exp is developed by DeepSeek.

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