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Claude Opus 4.5 Thinking vs DeepSeek V4 Flash

Compare Claude Opus 4.5 Thinking from Anthropic and DeepSeek V4 Flash from DeepSeek on key metrics including benchmarks, price, context length, and other model features. Access both models and hundreds of others through the AIHubMix API.

AnthropicClaude Opus 4.5 ThinkingDeepSeekDeepSeek V4 Flash
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Anthropic logo
Claude Opus 4.5 Thinking
Anthropic · text, image, pdf → text

Claude Opus 4.5 is Anthropic’s latest frontier reasoning model, optimized for complex engineering, agentic workflows, and long-horizon computer use. It features strong multimodal capabilities, improved resistance to prompt injection, and a new Verbosity parameter to control token efficiency. With advanced tool use, extended context, and multi-agent support, Opus 4.5 excels in autonomous research, debugging, planning, and spreadsheet/browser operations.

Input$5 /M
Output$25 /M
Cache read$0.5 /M
Details
DeepSeek logo
DeepSeek V4 Flash
DeepSeek · text → text

DeepSeek V4 Flash 0423 is DeepSeek's efficiency-optimized Mixture-of-Experts text model, designed for fast inference and workflows requiring tool use, function calling, and structured outputs. It features 284B total parameters with 13B activated parameters and supports a 1M-token context window with cost-effective pricing.

Input$0.464 /M
Output$0.928 /M
Cache read$0.0039 /M
Details

Pricing & Specifications

Prices are per million tokens. Time to First Token and throughput are rolling averages measured on AIHubMix.

Claude Opus 4.5 Thinking
DeepSeek V4 Flash
Input /M
$5
$0.464
Output /M
$25
$0.928
Cache read /M
$0.5
$0.0039
Context length
200,000
1,000,000
Max output
64,000
0
Time to First Token
-
0.7 s
Throughput
-
59.0 tok/s
Modalities
textimagepdf
text
Supported Parameters
thinkingtoolsfunction callingstructured outputs
toolsfunction callingstructured outputs
API Formats
Released
-
-

Promotional prices show the discounted rate; see each model page for promotion windows.

Activity Past 30 Days

Daily traffic served through AIHubMix — how demand for each model is trending.

claude-opus-4-5-thinkdeepseek-v4-flash

Tokens / day

-

Requests / day

-

Performance Past 3 Days

Measured on real AIHubMix traffic, hourly buckets. Gaps mean no traffic in that hour.

claude-opus-4-5-thinkdeepseek-v4-flash

Throughput (tok/s)

-

TTFT (s)

-

Uptime (%)

-

LMArena Benchmarks

LMArena ratings by capability (Bradley-Terry, commonly called Elo). Higher is better.

Text
claude-opus-4-5-thinkdeepseek-v4-flash
1400144014801520
Overall
14311450
Coding
14521498
Math
14281460
Instruction following
14201472
Longer query
14351479
Chinese
14671474
English
14391461

Source: LMArena (arena.ai) leaderboard, imported by AIHubMix. Models without published ratings are omitted per chart.

Cost calculator

Estimate your monthly bill for the same workload on each model.

DeepSeek V4 Flash
$41.76 /mo
Claude Opus 4.5 Thinking
$675 /mo

Monthly = daily × 30. Discounted rates applied where a promotion is active.

FAQ

Which is cheaper: Claude Opus 4.5 Thinking, DeepSeek V4 Flash?

DeepSeek V4 Flash: $0.928/M output tokens; Claude Opus 4.5 Thinking: $25/M. Use the cost calculator above to estimate your own workload.

How do their coding arena scores compare?

Claude Opus 4.5 Thinking: 1498; DeepSeek V4 Flash: 1452 (LMArena coding leaderboard).

How large is each context window?

Claude Opus 4.5 Thinking accepts 200,000 and DeepSeek V4 Flash accepts 1,000,000 input tokens.

What inputs and capabilities does each model support?

Claude Opus 4.5 Thinking accepts text, image and PDF input and supports thinking, tool calling, function calling and structured outputs; DeepSeek V4 Flash accepts text input and supports tool calling, function calling and structured outputs.

Can I call Claude Opus 4.5 Thinking and DeepSeek V4 Flash with the same API key?

Yes. AIHubMix serves every model on this page behind one OpenAI-compatible endpoint, so switching between them is a one-line change to the model field — no second account, key or SDK.

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