SmophyAI

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Real data comparison

Anthropic: Claude Opus 5.5 (batch) vs DeepSeek: DeepSeek V4.1 Flash (batch)

On quality, Anthropic: Claude Opus 5.5 (batch) leads (59.1 vs 28.6). On price, DeepSeek: DeepSeek V4.1 Flash (batch) is cheaper ($0.26 vs $8.00 per 1M). In real production usage, DeepSeek: DeepSeek V4.1 Flash (batch) is used more (rank #2 vs #16 of 404). Across 2 real task categories where both models have classified traffic, DeepSeek: DeepSeek V4.1 Flash (batch) handles more of the traffic in 2 of them.

  • Anthropic: Claude Opus 5.5 (batch)
  • DeepSeek: DeepSeek V4.1 Flash (batch)
Quality (Intelligence Index)59.1 / 28.6
Price ($/1M blended)$8.00 / $0.26
Average usage share2.99% / 21.42%
Best provider uptime100.0% / 100.0%
Context window1,000,000 / 1,048,576
Quality per dollar7.4 pts/$ / 109.0 pts/$

Head-to-head by real task

Anthropic: Claude Opus 5.5 (batch) leads 0 of 2 shared task categories by real classified traffic share; DeepSeek: DeepSeek V4.1 Flash (batch) leads 2. Not a benchmark score - this is what developers actually route to each model for, per OpenRouter's task classification.

TaskAnthropic: Claude Opus 5.5 (batch)DeepSeek: DeepSeek V4.1 Flash (batch)
Repo Scanning2.6%37.6%
Code Review1.6%28.5%

Usage share over time

43.58%32.69%21.79%10.90%0.00%Share of usageSep 10Oct 8Nov 6
  • Anthropic: Claude Opus 5.5 (batch)
  • DeepSeek: DeepSeek V4.1 Flash (batch)

Frequently asked questions

Anthropic: Claude Opus 5.5 (batch) vs DeepSeek: DeepSeek V4.1 Flash (batch): which is better quality?

Anthropic: Claude Opus 5.5 (batch) scores higher on Artificial Analysis's Intelligence Index (59.1 vs 28.6).

Anthropic: Claude Opus 5.5 (batch) vs DeepSeek: DeepSeek V4.1 Flash (batch): which is cheaper?

DeepSeek: DeepSeek V4.1 Flash (batch) is cheaper at $0.26/1M vs $8.00/1M.

Anthropic: Claude Opus 5.5 (batch) vs DeepSeek: DeepSeek V4.1 Flash (batch): which is used more?

DeepSeek: DeepSeek V4.1 Flash (batch) has higher real OpenRouter usage share (rank #2 vs #16 of 404).

Anthropic: Claude Opus 5.5 (batch) vs DeepSeek: DeepSeek V4.1 Flash (batch): which wins more real-world task categories?

DeepSeek: DeepSeek V4.1 Flash (batch) handles more traffic in 2 of 2 shared task categories where both models have classified OpenRouter usage.

Source: OpenRouter (openrouter.ai/rankings), as of November 7, 2026.

Benchmark scores: Artificial Analysis (artificialanalysis.ai) via OpenRouter (openrouter.ai/rankings).

Methodology: www.smophy.ai/benchmark/methodology

Token counts originate from each provider's own tokenizer and are not directly comparable across providers.