Compare Claude Sonnet 4.5 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.
Claude Sonnet 4.5
DeepSeek V4 FlashSonnet 4.5 is the best model in the world for agents, coding, and computer usage. It is also our most accurate and detailed model for long-running tasks, with enhanced knowledge in coding, finance, and cybersecurity. This model supports a thinking parameter to enable thinking requests in Claude mode.
(This model currently points to the older 0423 version; if you need to request the latest version, you can choose the model deepseek-v4-flash-0731)DeepSeek-V4 features an ultra-long context of one million characters and achieves leading performance domestically and in the open-source domain in agent capabilities, world knowledge, and reasoning.
Prices are per million tokens. Time to First Token and throughput are rolling averages measured on AIHubMix.
Promotional prices show the discounted rate; see each model page for promotion windows.
Daily traffic served through AIHubMix — how demand for each model is trending.
Measured on real AIHubMix traffic, hourly buckets. Gaps mean no traffic in that hour.
LMArena ratings by capability (Bradley-Terry, commonly called Elo). Higher is better.
Source: LMArena (arena.ai) leaderboard, imported by AIHubMix. Models without published ratings are omitted per chart.
Estimate your monthly bill for the same workload on each model.
Monthly = daily × 30. Discounted rates applied where a promotion is active.
DeepSeek V4 Flash: $0.284/M output tokens; Claude Sonnet 4.5: $16.5/M. Use the cost calculator above to estimate your own workload.
Claude Sonnet 4.5: 1514; DeepSeek V4 Flash: 1483 (LMArena coding leaderboard).
DeepSeek V4 Flash: 1.0s time to first token measured on AIHubMix; see the live performance charts above for how each model behaves across the day.
Claude Sonnet 4.5 accepts 200,000 and DeepSeek V4 Flash accepts 1,000,000 input tokens. Maximum output per request is 64,000 tokens on Claude Sonnet 4.5 and 384,000 tokens on DeepSeek V4 Flash.
DeepSeek V4 Flash at 66.5 tok/s and Claude Sonnet 4.5 at 53.0 tok/s, measured as output throughput on AIHubMix — a separate metric from time to first token.
Claude Sonnet 4.5 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, structured outputs and thinking.
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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