---
title: "Together AI Qwen 27B fine-tuning batch size limits changed: 2026-09-29 | Harbyn"
description: "Together AI Qwen 27B fine-tuning batch size limits changed, announced Sep 29, 2026."
canonical: "https://harbyn.com/changes/together/2026-09-29-qwen-27b-fine-tuning-batch-size-limits-changed"
last-updated: 2026-10-02
---

# Together AI Qwen 27B fine-tuning batch size limits changed

Markdown version of <https://harbyn.com/changes/together/2026-09-29-qwen-27b-fine-tuning-batch-size-limits-changed>.

Behavior change - Together AI. medium severity. In effect.

Fine-tuning LoRA jobs on Qwen/Qwen3.8-27B, Qwen/Qwen3.6-27B and Qwen/Qwen3.5-27B now run at batch size 2, down from 16, and the maximum DPO batch size for full fine-tuning on these models drops from 16 to 8.

## Facts

| Fact | Value |
| --- | --- |
| Vendor | [Together AI](https://harbyn.com/vendors/together.md) |
| Kind | Behavior change |
| Severity | medium |
| Status | In effect |
| Announced | Sep 29, 2026 |
| Added to Harbyn | Oct 2, 2026 |
| Lead time | No dated deadline |
| Model IDs | `Qwen/Qwen3.8-27B`, `Qwen/Qwen3.6-27B`, `Qwen/Qwen3.5-27B` |
| Review | Reviewed by a person, extracted by a model |

## Find it in your code

```sh
npx harbyn scan
```

The scanner reads your repository on your machine and reports every file and line that uses the identifiers above. Nothing leaves your machine.

## Sources

Where this event comes from: the page we read, when we read it, and the hash of that snapshot.

- <https://docs.together.ai/docs/changelog/rss.xml> (changelog, fetched 2026-10-02 02:32 UTC, sha256 `fcbbad56628774007d9600253e5e258f550a7801af8b7674517d9c7b737827d9`)

## Related changes

### More from Together AI

- [Batch API files retained for 7 days](https://harbyn.com/changes/together/2026-09-29-batch-api-files-retained-for-7-days.md) (Behavior change, announced Sep 29, 2026)
- [LoRA rank limit raised to 128, older SDKs now default to rank 128](https://harbyn.com/changes/together/2026-09-29-september-29-2026.md) (Behavior change, announced Sep 29, 2026)
- [lower serverless pricing for Qwen3.7-Max and Qwen3.8-Flash](https://harbyn.com/changes/together/2026-09-22-qwen-serverless-price-cut.md) (Pricing, effective Sep 22, 2026)
- [Together CLI v2.33.2 improvements](https://harbyn.com/changes/together/2026-09-10-preemptible-compute-for-gpu-clusters-preemptible-compute-is-now-in-public-pr-2.md) (Behavior change, announced Sep 10, 2026)

### Changes at other vendors

- [Amazon Selling Partner API: ORDER\_CHANGE notifications add PreFulfillmentStatusChange for Amazon Autos](https://harbyn.com/changes/amazon-sp-api/2026-10-14-sp-api-updates-new-listings-items-api-ivp-values-in-eu5-jp-and-ca-stores-oct-3.md) (effective Oct 28, 2026)
- [BigCommerce: 301 redirects will apply only to storefront channels](https://harbyn.com/changes/bigcommerce/2026-10-07-301-redirects-now-apply-to-storefront-channels-only.md) (effective Nov 10, 2026)
- [GitHub: Secret scanning audit log business field changes to enterprise slug](https://harbyn.com/changes/github/2026-10-20-updates-to-github-secret-scanning-7.md) (effective Nov 12, 2026)
- [Jira / Atlassian Cloud: New IP address ranges in use from January 1, 2027](https://harbyn.com/changes/atlassian-jira/2026-10-16-atlassian-cloud-adds-new-ip-address-ranges.md) (effective Jan 1, 2027)

[All upcoming deadlines](https://harbyn.com/deadlines.md)