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Default version compatibility

Seqera supports the two most recent major Seqera Platform versions (for example, 25.3.x and 26.1.x) at any given time.

Each Seqera Platform version uses nf-launcher to set its baseline Nextflow version. To use a different Nextflow version in your pipeline runs, add a pre-run script during launch. Seqera Platform may not work reliably with Nextflow versions other than the baseline.

If you do not specify a Nextflow version in your configuration, Seqera Platform uses the baseline version listed in the following table:

Platform versionnf-launcher versionNextflow versionFusion versionConnect client version
26.1.3j21-26.0426.042.40.12.0
26.1.2j21-26.0426.042.40.12.0
26.1.0j21-26.0426.042.40.12.0
25.3.6j21-25.10.225.10.22.40.11.0
25.3.4j21-25.10.225.10.22.40.9.0
25.3.1j21-25.10.225.10.22.40.9.0
25.3.0j21-25.04.825.04.82.4
25.2.4j21-25.04.325.04.32.4
25.2.3j21-25.04.325.04.32.4
25.2.2j21-25.04.325.04.32.4
25.2.3j21-25.04.325.04.32.4
25.2.1j21-25.04.325.04.32.4
25.1.3j17-24.10.9-b124.10.92.4
25.2.0j21-25.04.325.04.32.4
25.1.5j17-24.10.9-b124.10.92.4
25.1.4j17-24.10.9-b124.10.92.4
25.1.3j17-24.10.9-b124.10.92.4
25.2.3j21-25.04.325.04.32.4
25.2.1j21-25.04.325.04.32.4
25.1.3j17-24.10.9-b124.10.92.4
25.1.1j17-24.10.524.10.52.4
25.1.0j17-24.10.524.10.52.4
24.2.7j17-24.10.9-a124.10.92.4
24.2.4j17-24.10.424.10.42.4
24.2.1j17-24.10.224.10.22.4
25.1.0j17-24.10.524.10.52.4
24.2.7j17-24.10.9-a124.10.92.4
24.2.6j17-24.10.9-a124.10.92.4
25.1.0j17-24.10.524.10.52.4
24.2.7j17-24.10.9-a124.10.92.4
24.2.4j17-24.10.424.10.42.4
24.2.1j17-24.10.224.10.22.4
24.2.4j17-24.10.424.10.42.4
24.2.3j17-24.10.424.10.42.4
24.2.2j17-24.10.024.10.02.4
24.2.1j17-24.10.224.10.22.4
24.2.0j17-24.10.024.10.02.4

nf-launcher versions prefixed with j21 use Java 21, and versions prefixed with j17 use Java 17.