Claude Haiku 4.5 vs DeepSeek V4 Pro 0423 Cost
Claude Haiku 4.5 or DeepSeek V4 Pro 0423? Spec sheets compare headlines; this page prices your actual workload — and shows the output ratio where the answer flips.
For engineers choosing between two models — compares real bills at your workload (output skew + caching included) and shows where the answer flips, not a spec sheet.
Model prices from OpenRouter · updated 2026-08-31
01 Your matchup & workload
02 At your workload
DeepSeek V4 Pro 0423 wins by $63.90/month (22%) here.
Flip point: at ~145 output tokens/request the answer reverses — you're past it.
Related cost calculators
Prices from OpenRouter, snapshot 2026-08-31, synced daily. Each model billed at your workload with its own cache-read pricing on the cached share; flip point solves input × (effInA − effInB) + output × (outA − outB) = 0. Cost is a shortlist — quality on your evals decides. All math runs in your browser.
How the math works
Spec-sheet comparisons list prices; this page prices a workload. At the defaults — 1,000 input + 500 output tokens per request, 100,000 requests a month, 60% cached prefix — DeepSeek V4 Pro 0423 bills $232/month against Claude Haiku 4.5's $296: 22% apart.
Claude Haiku 4.5 lists $1/M in and $5/M out (cache reads $0.1/M); DeepSeek V4 Pro 0423 lists $1.6/M and $3.2/M (reads $0.135/M). Headlines don't settle it — the blend of your input/output mix and each model's caching does.
The answer flips: with 1,000 input tokens, the two bills cross at ~145 output tokens per request (ratio 0.14). Below it one wins, above it the other — check which side your workload sits on before committing.
Cost is the shortlist, not the verdict: context windows (Claude Haiku 4.5: 200K vs DeepSeek V4 Pro 0423: 1049K), caching support, and quality on your evals decide the rest. Prices sync daily from OpenRouter; all math runs in your browser.
Frequently asked questions
Which is cheaper, Claude Haiku 4.5 or DeepSeek V4 Pro 0423?
At this page's default workload, DeepSeek V4 Pro 0423: $232/month vs $296 — 22% less. But the gap depends on your input/output mix; past ~145 output tokens per request the answer flips. Tune the sliders above for your real shape.
Why not just compare the advertised prices?
Because they're input rates. Claude Haiku 4.5 charges $5/M for output and DeepSeek V4 Pro 0423 $3.2/M — and output typically drives 60–85% of a bill. Add caching ($0.1/M vs $0.135/M reads) and two same-headline models can differ 2–3× on a real workload.
When does the cheaper model flip?
At 1,000 input tokens with 60% cached, the bills cross at ~145 output tokens per request. Short-answer workloads favor one side, long-generation workloads the other — that's the number to check, not the headline.
Is the cheaper model the right choice?
Only if quality holds on your task. Use this page to quantify the price of preference: if Claude Haiku 4.5 wins your evals, the premium is $63.90/month at these defaults — sometimes that's obviously worth it, sometimes obviously not. Context windows and caching support (both shown above) can also decide it outright.
Are these prices current?
Prices sync daily from OpenRouter's public catalog and the page shows its snapshot date. If a sync fails, the last verified snapshot keeps serving. All math runs client-side with tested code.