Output tokens cost $0.31 per million on deepseek-v4-flash and $30.00 per million on gpt-5.5. Input tokens cost $0.15 per million on deepseek-v4-flash and $5.00 per million on gpt-5.5. Cached input tokens are billed at $0.00 per million on deepseek-v4-flash and $0.50 per million on gpt-5.5. Context windows are 1,000,000 tokens on deepseek-v4-flash and 1,050,000 tokens on gpt-5.5. First-token latency measured on AIHubMix is 1.2s on deepseek-v4-flash and 5.4s on gpt-5.5. Measured output throughput is 101.3 tokens/s on deepseek-v4-flash and 49.1 tokens/s on gpt-5.5.
deepseek-v4-flash
gpt-5.5DeepSeek-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.
GPT-5.5 raises the baseline for complex production workflows. It’s a strong fit for coding use cases, tool-heavy agents, grounded assistants, long-context retrieval, product-spec-to-plan workflows, and customer-facing workflows where execution quality and response polish are critical.
Prices are per million tokens. Latency 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.
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: $0.31/M output tokens; gpt-5.5: $30.00/M. Use the cost calculator above to estimate your own workload.
deepseek-v4-flash: 1.2s first-token latency measured on AIHubMix; see the live performance charts above for how each model behaves across the day.
deepseek-v4-flash accepts 1,000,000 and gpt-5.5 accepts 1,050,000 input tokens. Maximum output per request is 384,000 tokens on deepseek-v4-flash and 128,000 tokens on gpt-5.5.
deepseek-v4-flash at 101.3 tokens/s and gpt-5.5 at 49.1 tokens/s, measured as output throughput on AIHubMix — a separate metric from first-token latency.
deepseek-v4-flash accepts text input and supports tool calling, function calling, structured outputs and thinking; gpt-5.5 accepts text and image input and supports thinking, function calling, structured outputs, web search and tool calling.
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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