ChatGPT vs Gemini: which should you use?
A side-by-side look at ChatGPT and Gemini — context window, price per million tokens, and what each one is actually better at. In Blend you can use both and switch mid-conversation.
Model data updated: 2026-10-04
Short answer
Neither wins every task. ChatGPT and Gemini each have questions they answer better, which is why picking one for everything costs you quality. Blend routes each question to whichever fits, so you do not have to decide up front.
- GPT-5.6 Terra is the cheaper of the two on input tokens ($0.50 per 1M).
- Gemini 2.5 Pro takes the longer context window (1.0M tokens).
| Representative model | Provider | Context | Input | Output | Images |
|---|---|---|---|---|---|
| ChatGPT — GPT-5.6 Terra | OpenAI | 128K | $0.50 | $1.50 | Yes |
| Gemini — Gemini 2.5 Pro | 1.0M | $1.25 | $10 | Yes |
Input / Output: per 1M tokens. Prices are the providers’ list prices in USD per million tokens and can change at any time. Use them for comparison, not billing.
- On input tokens, Gemini costs about 2.5× what ChatGPT costs.
- On output tokens, the gap is about 6.7× in favour of ChatGPT.
ChatGPT models you can use in Blend
| Model | Context | Input | Output | Images |
|---|---|---|---|---|
| GPT-5.6 Terra | 128K | $0.50 | $1.50 | Yes |
| GPT-5.2 | 128K | $0.50 | $1.50 | Yes |
| GPT-5.4 mini | 128K | $0.50 | $1.50 | Yes |
| GPT-5.4 nano | 128K | $0.50 | $1.50 | Yes |
Blend currently exposes 4 ChatGPT models with published pricing or context figures.
Gemini models you can use in Blend
| Model | Context | Input | Output | Images |
|---|---|---|---|---|
| Gemini 2.5 Pro | 1.0M | $1.25 | $10 | Yes |
| Gemini Pro | 1.0M | $0.10 | $0.40 | Yes |
| Gemma 4 31B IT | 262K | $0.10 | $0.40 | Yes |
| Gemma 4 26B IT | 262K | $0.10 | $0.40 | Yes |
| Gemini 3.8 Flash | 1.0M | — | — | Yes |
Blend currently exposes 7 Gemini models with published pricing or context figures.
What ChatGPT is good at
The most widely used general-purpose assistant, with the broadest ecosystem of tools and integrations.
- Balanced quality across almost every task
- Strongest tool and plugin ecosystem
- Reliable multimodal (image) understanding
What Gemini is good at
Strong price-to-performance with fast responses and generous free access — the model behind Blend’s free trial.
- Excellent cost per token
- Fast responses for everyday questions
- Long context and solid multilingual support
Tasks where ChatGPT is the first pick
Tasks where Gemini is the first pick
Frequently asked
Is ChatGPT or Gemini cheaper?
GPT-5.6 Terra has the lower input price at $0.50 per million tokens, based on the registry figures in the table above.
Which handles longer documents, ChatGPT or Gemini?
Gemini 2.5 Pro takes the longer context window at 1.0M tokens, so it can read more of a long file in one pass.
How many ChatGPT and Gemini models does Blend include?
4 from ChatGPT and 7 from Gemini, and the list updates automatically when a provider adds or retires a model.
Can I ask ChatGPT and Gemini the same question at once?
Yes. Blend sends one question to both and puts the answers side by side, and a second model can fact-check the first. There is a free daily tier with no signup.
Blend — one question, multiple AIs, better answers
Related comparisons
Model capabilities and prices change often. Figures come from Blend’s automatically synced registry and are shown for comparison. All model prices · Terms · Privacy Policy · Refund