LLMCost

Chatbot LLM Cost

Customer-facing or internal chat assistants. Monthly estimates at 10,000 requests/mo, avg 800 input / 400 output tokens per request.

#ModelEst. monthly costvs cheapest
1Qwen: Qwen3.7 Flash$0.760
2DeepSeek: DeepSeek V4 Flash 0731$1.361.8×
3OpenAI: GPT-5 Nano$2.002.6×
4Google: Gemini 2.5 Flash Lite$2.403.2×
5OpenAI: GPT-5.6 Luna Pro (batch)$3.204.2×
6OpenAI: GPT-5.6 Luna (batch)$3.204.2×
7DeepSeek: DeepSeek V4 Flash Vision Exp$4.405.8×
8Meta: Llama 4 Maverick$4.806.3×
9Google: Gemini 3.7 Flash (batch)$5.256.9×
10Google: Gemini 3.5 Flash Lite (batch)$6.208.2×
11OpenAI: GPT-5.6 Luna$6.408.4×
12OpenAI: GPT-5.6 Luna Pro$6.408.4×
13OpenAI: GPT-5.4 Nano$6.608.7×
14Qwen: Qwen3.7 Plus$7.6810.1×
15Google: Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image)$8.0010.5×
16OpenAI: GPT-5 Mini$10.0013.2×
17Google: Gemini 3.7 Flash$10.5013.8×
18Google: Gemini 3.6 Flash (batch)$10.5013.8×
19Qwen: Qwen3 235B A22B$10.9214.4×
20DeepSeek: DeepSeek V3.1$11.0014.5×
21Google: Gemini 3.5 Flash Lite$12.4016.3×
22Google: Gemini 2.5 Flash$12.4016.3×
23Qwen: Qwen3.8 27B$15.2020.0×
24DeepSeek: R1$15.6020.5×
25Google: Nano Banana 2 (Gemini 3.1 Flash Image)$16.0021.1×
26Amazon: Nova Pro 1.0$19.2025.3×
27Google: Gemini 3.6 Flash$21.0027.6×
28DeepSeek: DeepSeek V4 Pro 0813$22.4429.5×
29OpenAI: GPT-5.4 Mini$24.0031.6×
30OpenAI: o4 Mini$26.4034.7×
31OpenAI: GPT-5.6 Sol Pro (batch)$28.0036.8×
32OpenAI: GPT-5.6 Sol (batch)$28.0036.8×
33Anthropic: Claude Sonnet 5 (batch)$28.0036.8×
34OpenAI: GPT-5.6 Terra Pro (batch)$32.0042.1×
35OpenAI: GPT-5.6 Terra (batch)$32.0042.1×
36Qwen: Qwen3.8 2.4T A95B$40.0052.6×
37SpaceXAI: Grok 4.6$40.0052.6×
38Qwen: Qwen3.8 Max$40.0052.6×
39SpaceXAI: Grok 4.5$40.0052.6×
40Google: Gemini 3.5 Flash$48.0063.2×
41OpenAI: o3$48.0063.2×
42OpenAI: GPT-5$50.0065.8×
43Google: Gemini 2.5 Pro$50.0065.8×
44OpenAI: GPT-5.6 Sol$56.0073.7×
45Anthropic: Claude Sonnet 5$56.0073.7×
46OpenAI: GPT-5.6 Sol Pro$56.0073.7×
47OpenAI: GPT-5.6 Terra Pro$64.0084.2×
48OpenAI: GPT-5.6 Terra$64.0084.2×
49Google: Nano Banana Pro (Gemini 3 Pro Image)$64.0084.2×
50Claude Opus 5 (batch)$70.0092.1×
51Anthropic: Claude Opus 4.8 (batch)$70.0092.1×
52OpenAI: GPT-5.4$80.00105.3×
53Anthropic: Claude Sonnet 4.5$84.00110.5×
54Claude Opus 5$140.00184.2×
55Anthropic: Claude Fable 5 (batch)$140.00184.2×
56Anthropic: Claude Opus 4.8$140.00184.2×
57OpenAI: GPT-5.5$160.00210.5×
58Anthropic: Claude Fable 5$280.00368.4×
59Claude Opus 5 (Fast)$280.00368.4×
60Anthropic: Claude Opus 4.8 (Fast)$280.00368.4×
61Anthropic: Claude Opus 4.1$420.00552.6×
62OpenAI: GPT-5 Pro$600.00789.5×
63OpenAI: GPT-5.5 Pro$960.001263.2×

Cost-saving tips for chatbots

  • Cache your system prompt — repeated context is where caching saves 90%.
  • Route simple greetings to a mini/nano tier; escalate only on complex queries.
  • Cap max_output_tokens to prevent runaway responses.

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