GPT-5 Pro
$15.00 per 1M input tokens and $120 per 1M output tokens · 400K context · vision, tools, reasoning, JSON.
Prices checked Oct 21, 2026 · tracked by LLM Cost Index since Oct 21, 2026
Cheaper ways to run the same model: GPT-5 Pro (batch) at $7.50 / $60.00 — same model, different service (e.g. batch processing with a delay).
What GPT-5 Pro costs per month
Estimated monthly bill for typical workloads. Try your own numbers in the cost calculator.
| Workload | Per month |
|---|---|
| Customer chatbot 1,000 conversations a day, 8 turns each | $15,480 |
| Document Q&A (RAG) 500 questions a day over retrieved documents | $2,250 |
| Coding / tool-using agent 200 tasks a day, long tool-heavy contexts | $8,280 |
| Content generation 30 long articles a day | $311 |
| Classification / extraction 100,000 short items a day | $18,900 |
Price history
We started tracking GPT-5 Pro on Oct 21, 2026; the chart appears as soon as there is a second data point. See all recent price changes.
Cheaper alternatives to GPT-5 Pro
Models with the same tool calling, image input, structured output for at least 20% less (3:1 input/output mix), most capable first.
| Model | Input / 1M | Output / 1M | Context | Capabilities |
|---|---|---|---|---|
| Claude Opus 5.5 Anthropic | $4.00 | $20.00 | 1M | visiontoolsreasoningJSON |
| Claude Sonnet 5.5 Anthropic | $2.00 | $10.00 | 1M | visiontoolsreasoningJSON |
| Claude Fable 5.1 Anthropic | $10.00 | $50.00 | 1M | visiontoolsreasoningJSON |
| GPT-6 Astra OpenAI | $10.00 | $50.00 | 1.05M | visiontoolsreasoningJSON |
| Gemini 4 Argon | $2.00 | $10.00 | 1.05M | visionaudiotoolsreasoningJSON |
How to pay less for GPT-5 Pro
For a customer chatbot (1,000 conversations a day, 8 turns each) that costs $15,480 a month at list price without caching:
| Option | Per month | You save |
|---|---|---|
| Move to Claude Opus 5.5 (similar capabilities) | $2,299 | $13,181 (85%) |
| Switch to GPT-5 Pro (batch) | $7,740 | $7,740 (50%) |
Other workloads: cut-your-bill tool for GPT-5 Pro.
Specifications
| Model ID | openai/gpt-5-pro |
| Input | image, text, file |
| Output | text |
| Tool calling | Yes |
| Structured output | Yes |
| Reasoning mode | Yes |
| Open weights | No |
| Knowledge cutoff | 2024-09-30 |
| Released | Oct 6, 2025 |
| Web search | $0.01 per request |
FAQ
- How much does GPT-5 Pro cost?
- $15.00 per million input tokens and $120 per million output tokens. Prices as of Oct 21, 2026.
- What is the context window of GPT-5 Pro?
- 400K tokens, with up to 128K output tokens per response.
- Does GPT-5 Pro support images, tools and structured output?
- Images as input: yes. Tool calling: yes. Structured (JSON) output: yes. Reasoning mode: yes.
- What are cheaper alternatives to GPT-5 Pro?
- Models with the same key capabilities for at least 20% less include Claude Opus 5.5 ($4.00 / $20.00), Claude Sonnet 5.5 ($2.00 / $10.00), Claude Fable 5.1 ($10.00 / $50.00).
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