# Claude Haiku 5.5 vs GPT-5.4 nano

Claude Haiku 5.5 is the cheaper of the 2: for the same tokens, 3 read for each 1 written, GPT-5.4 nano costs 2.3 times as much. Below are both price lists, what 8 everyday jobs cost a month on each, and how many tokens the same text takes on each, which can change the answer.

- Page, with a calculator for your own job: https://tecyfy.com/prices/compare/claude-haiku-5-5-vs-gpt-5-4-nano
- Makers: Claude Haiku 5.5 from Anthropic, GPT-5.4 nano from OpenAI

## Price per million tokens, in US dollars

| | Claude Haiku 5.5 | GPT-5.4 nano |
| --- | --: | --: |
| Input | $0.10 | $0.20 |
| Cached input | $0.01 | $0.02 |
| Cache write | $0.125 | not listed |
| Output | $0.50 | $1.25 |
| Blend, 3 read for each 1 written | $0.20 | $0.4625 |
| Batch input | $0.05 | $0.10 |
| Batch output | $0.25 | $0.625 |
| Long prompt input (above 100K on Claude Haiku 5.5) | $0.50 | $0.20 |
| Long prompt output | $2.50 | $1.25 |
| Context window, tokens | 1M | 400K |
| Capability score (Epoch Capabilities Index; GPT-5 is 150) | 159 | 146 |
| Longest answer, tokens | 128K | 128K |

## The same text, counted by each maker

Our lesson "How AI writes" (https://tecyfy.com/learn/how-ai-works/how-ai-writes), about 1,700 words of English:

- Claude Haiku 5.5: about 2,100 to 3,600 tokens. Anthropic does not publish its tokenizer. It says Claude 4.7 and later produce about 30 percent more tokens for the same text than earlier models, and an independent test counted TypeScript at 1.73 times OpenAI's figure. The range runs from OpenAI's count to 1.75 times it.
- GPT-5.4 nano: about 2,100 tokens. GPT-5.6 is counted with o200k_base, the tokenizer OpenAI publishes for it, so its count is exact. OpenAI has not published the tokenizer of GPT-6, so its count is the same o200k_base figure, marked as about.

## What 8 everyday jobs cost a month on each

Each job at its usual runs a day, for 30 days, at the standard price.

| Job | Tokens in, out, runs a day | Claude Haiku 5.5 | GPT-5.4 nano |
| --- | --- | --: | --: |
| A chat question | 300, 500, 100 | 84 cents | $2.06 |
| A hard question, with thinking | 300, 1,400, 100 | $2.19 | $5.43 |
| A long report, summarised | 60,000, 2,000, 20 | $4.20 | $8.70 |
| A 40-turn agent task | 2,800,000, 40,000, 10 | $21.96 | $46.92 |
| A support bot's reply | 4,000, 300, 2,000 | $22.20 | $48.90 |
| Sort a message into a category | 250, 5, 50,000 | $41.25 | $84.38 |
| Read an invoice into fields | 1,500, 250, 1,000 | $8.25 | $18.37 |
| Review a pull request | 25,000, 4,500, 50 | $7.13 | $15.94 |

## Questions

### Which is cheaper, Claude Haiku 5.5 or GPT-5.4 nano?

Claude Haiku 5.5 is cheaper: $0.10 per million tokens read and $0.50 per million written, against $0.20 and $1.25 on GPT-5.4 nano. On a mix of 3 tokens read for each 1 written, GPT-5.4 nano costs 2.3 times as much.

### Which is better, Claude Haiku 5.5 or GPT-5.4 nano?

On the Epoch Capabilities Index, an independent score from Epoch AI that combines over 50 benchmarks, Claude Haiku 5.5 scores 159 and GPT-5.4 nano 146, above the top of the range of doubt around GPT-5.4 nano's score (GPT-5 is 150). One score is an average; test both on your own work before you switch.

### What does a support bot cost a month on Claude Haiku 5.5 and GPT-5.4 nano?

At 2,000 replies a day, each reading 4,000 tokens (50 percent of them from cache) and writing 300, it costs $22.20 a month on Claude Haiku 5.5 and $48.90 on GPT-5.4 nano: GPT-5.4 nano costs 2.2 times as much for this job.

### What does an AI agent task cost on Claude Haiku 5.5 and GPT-5.4 nano?

One 40-turn task that reads 2,800,000 tokens in all, 90 percent of them from cache, and writes 40,000, costs 7.3 cents on Claude Haiku 5.5 and 16 cents on GPT-5.4 nano. At 10 tasks a day that is $21.96 and $46.92 a month.

### Which has the larger context window, Claude Haiku 5.5 or GPT-5.4 nano?

Claude Haiku 5.5, with 1M tokens against 400K on GPT-5.4 nano. The window holds your instructions, the files you attach, the conversation so far and the answer, all at once.

### Does the same text take the same number of tokens on Claude Haiku 5.5 and GPT-5.4 nano?

No. Our lesson "How AI writes", 1,700 words long, is about 2,100 to 3,600 tokens on Claude Haiku 5.5 and about 2,100 on GPT-5.4 nano. Each maker cuts text its own way, and every extra token is paid for at the model's price.

### Can I pay less on Claude Haiku 5.5 and GPT-5.4 nano for work that can wait?

Yes, on both. With a batch, where you collect the answers later instead of at once, Claude Haiku 5.5 costs $0.05 per million tokens read and $0.25 written, and GPT-5.4 nano $0.10 and $0.625.

## Sources

- [Anthropic: API prices](https://platform.claude.com/docs/en/about-claude/pricing)
- [OpenAI: API prices](https://developers.openai.com/api/docs/pricing)
- [Epoch Capabilities Index, by Epoch AI (CC BY 4.0)](https://epoch.ai/benchmarks/eci)

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