# Qwen3.7-Flash vs Qwen3.8-Flash

Qwen3.8-Flash is one of Alibaba's newest models and Qwen3.7-Flash an earlier one, so this is also what moving up costs or saves. Qwen3.7-Flash is the cheaper of the 2: for the same tokens, 3 read for each 1 written, Qwen3.8-Flash costs 4.2 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/qwen3-7-flash-vs-qwen3-8-flash
- Makers: Qwen3.7-Flash from Alibaba, Qwen3.8-Flash from Alibaba

## Price per million tokens, in US dollars

| | Qwen3.7-Flash | Qwen3.8-Flash |
| --- | --: | --: |
| Input | $0.03 | $0.15 |
| Cached input | $0.006 | $0.016 |
| Cache write | not listed | not listed |
| Output | $0.13 | $0.47 |
| Blend, 3 read for each 1 written | $0.055 | $0.23 |
| Batch input | not listed | not listed |
| Batch output | not listed | not listed |
| Long prompt input (above 32K on Qwen3.7-Flash) | $0.10 | $0.15 |
| Long prompt output | $0.40 | $0.47 |
| Context window, tokens | not listed | not listed |
| Capability score (Epoch Capabilities Index; GPT-5 is 150) | 145 | not listed |
| Longest answer, tokens | not listed | not listed |

Qwen3.7-Flash: For requests up to 32,000 input tokens. Above 256,000 it is $0.20 in and $0.80 out.

## 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 | Qwen3.7-Flash | Qwen3.8-Flash |
| --- | --- | --: | --: |
| A chat question | 300, 500, 100 | 22 cents | 84 cents |
| A hard question, with thinking | 300, 1,400, 100 | 57 cents | $2.11 |
| A long report, summarised | 60,000, 2,000, 20 | $1.24 | $5.96 |
| A 40-turn agent task | 2,800,000, 40,000, 10 | $8.62 | $30.34 |
| A support bot's reply | 4,000, 300, 2,000 | $6.66 | $28.38 |
| Sort a message into a category | 250, 5, 50,000 | $12.23 | $59.77 |
| Read an invoice into fields | 1,500, 250, 1,000 | $2.33 | $10.27 |
| Review a pull request | 25,000, 4,500, 50 | $2.00 | $8.80 |

## Questions

### Which is cheaper, Qwen3.7-Flash or Qwen3.8-Flash?

Qwen3.7-Flash is cheaper: $0.03 per million tokens read and $0.13 per million written, against $0.15 and $0.47 on Qwen3.8-Flash. On a mix of 3 tokens read for each 1 written, Qwen3.8-Flash costs 4.2 times as much.

### Which is better, Qwen3.7-Flash or Qwen3.8-Flash?

Qwen3.7-Flash scores 145 on the Epoch Capabilities Index, an independent score from Epoch AI that combines over 50 benchmarks (GPT-5 is 150). Qwen3.8-Flash has no independent score yet, so the only fair test is to run the same 10 tasks on both.

### What does a support bot cost a month on Qwen3.7-Flash and Qwen3.8-Flash?

At 2,000 replies a day, each reading 4,000 tokens (50 percent of them from cache) and writing 300, it costs $6.66 a month on Qwen3.7-Flash and $28.38 on Qwen3.8-Flash: Qwen3.8-Flash costs 4.3 times as much for this job.

### What does an AI agent task cost on Qwen3.7-Flash and Qwen3.8-Flash?

One 40-turn task that reads 2,800,000 tokens in all, 90 percent of them from cache, and writes 40,000, costs 2.9 cents on Qwen3.7-Flash and 10 cents on Qwen3.8-Flash. At 10 tasks a day that is $8.62 and $30.34 a month.

### Does the same text take the same number of tokens on Qwen3.7-Flash and Qwen3.8-Flash?

Yes, both are counted the same way: our lesson "How AI writes", 1,700 words long, is about 2,100 tokens on each.

### Is it cheaper to move from Qwen3.7-Flash to Qwen3.8-Flash?

No, it costs more per token: Qwen3.8-Flash charges $0.15 per million tokens read and $0.47 written, against $0.03 and $0.13 on Qwen3.7-Flash, 4.2 times as much for the same tokens. It pays off only if better answers save more than that, for example in fewer retries.

### Can I pay less on Qwen3.7-Flash and Qwen3.8-Flash for work that can wait?

Not with a batch price: neither maker's price page lists one for these models. A cache still lowers the price of text the model reads again.

## Sources

- [Alibaba: API prices](https://www.qwencloud.com/pricing/api)
- [Epoch Capabilities Index, by Epoch AI (CC BY 4.0)](https://epoch.ai/benchmarks/eci)

## Other comparisons

- [Qwen3.7-Max vs Qwen3.8-Flash](https://tecyfy.com/prices/compare/qwen3-7-max-vs-qwen3-8-flash.md)
- [Qwen3.7-Plus vs Qwen3.8-Flash](https://tecyfy.com/prices/compare/qwen3-7-plus-vs-qwen3-8-flash.md)
- [Qwen3.7-Flash vs Qwen3.8-Max](https://tecyfy.com/prices/compare/qwen3-7-flash-vs-qwen3-8-max.md)
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