The Cheapest AI APIs in 2026
Compare 42 models across 10 providers. Sorted by input cost. Real pricing data, updated daily. Find the cheapest model that fits your needs.
AI API Models Ranked by Input Cost (per 1M tokens)
| # |
Model |
Provider |
Input Cost |
Output Cost |
Context |
Savings vs GPT-5 |
| 1 |
Mistral Small 4 |
Mistral |
$0.10/M |
$0.30/M |
128K |
92% cheaper |
| 2 |
DeepSeek V4 Flash |
DeepSeek |
$0.10/M |
$0.28/M |
128K |
92% cheaper |
| 3 |
Llama 4 Maverick |
Together |
$0.20/M |
$0.60/M |
1M |
84% cheaper |
| 4 |
Llama 4 Scout |
Together |
$0.18/M |
$0.54/M |
1M |
86% cheaper |
| 5 |
GPT-5 mini |
OpenAI |
$0.40/M |
$1.60/M |
128K |
68% cheaper |
| 6 |
DeepSeek V4 Pro |
DeepSeek |
$0.435/M |
$0.87/M |
1M |
65% cheaper |
| 7 |
GPT-5 |
OpenAI |
$1.25/M |
$10.00/M |
272K |
Baseline |
| 8 |
Gemini 2.5 Pro |
Google |
$1.25/M |
$10.00/M |
1M |
Same input |
| 9 |
Gemini 3.5 Flash |
Google |
$1.50/M |
$9.00/M |
1M |
20% more |
| 10 |
Claude Sonnet 4.6 |
Anthropic |
$3.00/M |
$15.00/M |
200K |
140% more |
| 11 |
Claude Opus 4.8 |
Anthropic |
$5.00/M |
$25.00/M |
200K |
300% more |
See all 42 models → ·
Live pricing dashboard →
Cheapest Model by Use Case
💬 Chatbots & Customer Support
Best: DeepSeek V4 Flash ($0.10/$0.28)
Cheapest capable model for conversational AI. Handles multi-turn dialogs, FAQ responses, and support tickets at 92% less than GPT-5.
Find cheapest for your chatbot →
💻 Code Generation
Best: DeepSeek V4 Pro ($0.435/$0.87)
Strong coding performance at 85% less than Sonnet 4.6. Handles code review, generation, and refactoring with 1M context.
See coding model rankings →
📝 Content Writing
Best: GPT-5 mini ($0.40/$1.60)
Excellent for blog posts, marketing copy, and documentation. 68% cheaper than GPT-5 with comparable quality for content tasks.
See content writing rankings →
📊 Data Analysis
Best: Gemini 2.5 Pro ($1.25/$10)
1M context handles large datasets. Strong at extraction, summarization, and structured output. Same price as GPT-5 with more context.
See data analysis rankings →
🔍 RAG & Knowledge Base
Best: Gemini 2.5 Pro ($1.25/$10)
1M context is perfect for large document retrieval. Strong at finding relevant information across massive knowledge bases.
See RAG model rankings →
🏢 Enterprise / High Quality
Best: Claude Opus 4.8 ($5/$25)
When quality is paramount. Best reasoning, analysis, and complex task performance. Worth the premium for high-stakes applications.
See agent model rankings →
Frequently Asked Questions
What is the cheapest AI API available in 2026?
Mistral Small 4 and DeepSeek V4 Flash are the cheapest capable models at $0.10 per million input tokens. For a model with stronger capabilities, DeepSeek V4 Pro at $0.435/M input offers the best value. All prices are verified from provider APIs and updated daily.
How much can I save by switching from GPT-5?
Switching from GPT-5 ($1.25/M input) to DeepSeek V4 Pro ($0.435/M) saves 65% on input costs. For a typical workload of 10M input + 5M output tokens per month, that's approximately $3,480/year in savings. Switching to Mistral Small 4 saves 92% on input costs.
Are cheap AI models as good as expensive ones?
It depends on the task. For chatbots, content writing, and simple analysis, budget models like DeepSeek V4 Pro perform comparably to GPT-5. For complex reasoning, code generation, and high-stakes decisions, premium models like Claude Opus 4.8 still lead. The key is matching the model to your specific use case.
How do I switch to a cheaper AI model?
Most cheap alternatives (DeepSeek, Mistral, Together) support OpenAI-compatible APIs, so switching often requires just changing the API endpoint and key. APIpulse Pro generates copy-paste migration code for your specific setup. Most developers complete the switch in under 5 minutes.
What's the cheapest AI API for high volume?
For high-volume workloads (100K+ requests/day), Mistral Small 4 ($0.10/M) or DeepSeek V4 Flash ($0.10/M) are cheapest. At 100M input tokens/month, Mistral Small 4 costs $10 vs GPT-5's $125 — saving $1,380/year on input alone.
Find Your Cheapest Model in 30 Seconds
Enter your current model and usage. See exactly how much you'd save by switching.
No credit card required · Instant access · 14-day money-back guarantee