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Anthropic vs DeepSeek

Claude Opus 5.5 vs DeepSeek V4 Flash: pricing comparison

DeepSeek V4 Flash costs 50.0× less than Claude Opus 5.5 for a typical 1,000-input, 500-output request. Here is how the two compare on price, context and discounts.

Prices last updated:

Claude Opus 5.5DeepSeek V4 Flash
ProviderAnthropicDeepSeek
Input per 1M tokens$4.00$0.14
Output per 1M tokens$20.00$0.28
Context window1M1M
Batch discount50% offNot offered
Typical request (1,000 in / 500 out)$0.014$0.00028
Monthly at 1,000 requests/day$420.00$8.40

Claude Opus 5.5: Successor to Claude Opus 5 at a lower per-token price.

DeepSeek V4 Flash: Open-weight model; price shown is DeepSeek's first-party API (cache-miss input).

Compare with your own numbers

Claude Opus 5.5 per request
$0.014
Per month
$420.00
DeepSeek V4 Flash per request
$0.00028
Per month
$8.40

Cost by task

Cost per 1,000 requests at standard prices.
TaskTokens (in / out)Claude Opus 5.5DeepSeek V4 Flash
Short chat reply500 / 300$8.00$0.154
RAG answer6,000 / 600$36.00$1.01
Summarize a long document12,000 / 1,000$68.00$1.96
Output-heavy generation1,000 / 4,000$84.00$1.26

Output tokens usually dominate the bill — see input vs output token cost.

Frequently asked questions

Is Claude Opus 5.5 or DeepSeek V4 Flash cheaper?
DeepSeek V4 Flash is cheaper for a typical request of 1,000 input and 500 output tokens: $0.00028 versus $0.014 for Claude Opus 5.5, about 98% less.
What are the per-token prices of Claude Opus 5.5 and DeepSeek V4 Flash?
Claude Opus 5.5 costs $4.00 input and $20.00 output per million tokens. DeepSeek V4 Flash costs $0.14 input and $0.28 output per million tokens.
Which has the larger context window, Claude Opus 5.5 or DeepSeek V4 Flash?
Both accept 1M tokens of context.

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