{"type":"post","id":"prime-intellect-has-released-prime-rl-v0-10-2e34fd","slug":"prime-intellect-has-released-prime-rl-v0-10-2e34fd","title":"Prime Intellect has released prime-rl v0.10.0 and verifiers v0.4.0 .","description":"The release makes INTELLECT Policy Optimization (IPO) the default RL loss in prime-rl v0.10.0, with ε=0.3 and no KL term.","retrieval_nugget":"The release makes INTELLECT Policy Optimization (IPO) the default RL loss in prime-rl v0.10.0, with ε=0.3 and no KL term.","published_at":"2026-10-20","updated_at":"2026-10-20","record_date":"2026-10-20","date_kind":"published_at","topics":["models","evals","open-source"],"source_urls":["https://github.com/PrimeIntellect-ai/prime-rl/releases/tag/v0.10.0"],"schema_version":"newruntime-agent-readable-v0.2","stable_id":"post:prime-intellect-has-released-prime-rl-v0-10-2e34fd","status":"published","visuals":[],"editorial_provenance":{"schema_version":"newruntime-editorial-copy-v1","content_status":"source_grounded_final","final_copy_sha256":"sha256:fb53155f2fd0a7dafabd6e34cc9223f78ec51eb39ce252fb3ea006d8f436323b","reviewed_at":"2026-10-20T08:05:15.041Z","source_evidence_count":1,"verified_claim_count":2,"site_analysis_schema_version":"newruntime-site-analysis-v1","site_object_kind":"field_note","observed_fact_count":2,"implication_count":2,"watch_condition_count":1,"related_record_count":0},"analysis":{"schema_version":"newruntime-site-analysis-v1","object_kind":"field_note","thesis":"A training system’s treatment of trainer–inference disagreement is becoming an explicit algorithmic choice, not merely a nuisance to smooth over.","observed_facts":[{"text":"prime-rl v0.10.0 makes IPO the default RL loss, with ε=0.3 and no KL term.","source_urls":["https://github.com/PrimeIntellect-ai/prime-rl/releases/tag/v0.10.0"]},{"text":"The release reports Qwen3-235B-A22B SFT at 4.39 seconds per step for prime-rl versus 5.04 for torchtitan on the same stated configuration: 4 × 8 B300 and sequence length 16k.","source_urls":["https://github.com/PrimeIntellect-ai/prime-rl/releases/tag/v0.10.0"]}],"mechanism":"IPO masks a token when the absolute difference between trainer and inference probabilities exceeds ε, rather than using a ratio threshold; the release describes the mask as double-sided and independent of advantage sign.","why_now":"prime-rl v0.10.0 makes IPO its default, so teams adopting the version encounter the choice without an opt-in step.","implications":["Teams using asynchronous RL should compare IPO with their existing loss on task-specific outcomes and training stability before assuming the default is an improvement.","The published step-time comparison is tied to a specified model and setup and should not be treated as a general performance guarantee."],"evidence_boundary":"The evidence is the project’s release notes and benchmark claims; it does not establish that IPO improves every agentic RL task or that the throughput advantage transfers to other hardware and workloads.","watch_conditions":["Look for independent replications of the IPO comparison on agentic tasks that report both learning outcomes and stability, not just step speed."],"related_records":[],"new_branch_reason":"No prior New Runtime record is supplied for this specific versioned change, so this release begins a distinct analytical record."},"editor":{"role":"editor","name":"Andrey Reshetnikov","profile":"https://newruntime.com/owner-profile.md","profile_json":"https://newruntime.com/owner-profile.json","same_as":["https://www.linkedin.com/in/reshetnikov1/","https://t.me/lapetuse"]},"routes":{"html":"https://newruntime.com/posts/prime-intellect-has-released-prime-rl-v0-10-2e34fd/","markdown":"https://newruntime.com/posts/prime-intellect-has-released-prime-rl-v0-10-2e34fd.md","json":"https://newruntime.com/posts/prime-intellect-has-released-prime-rl-v0-10-2e34fd.json"},"next_reads":[{"type":"topic","path":"/topics/models/","url":"https://newruntime.com/topics/models/","title":"Models","reason":"Explore the models topic hub.","media_type":"text/html","markdown_url":"https://newruntime.com/topics/models.md","json_url":"https://newruntime.com/topics/models.json"},{"type":"topic","path":"/topics/evals/","url":"https://newruntime.com/topics/evals/","title":"Evals","reason":"Explore the evals topic hub.","media_type":"text/html","markdown_url":"https://newruntime.com/topics/evals.md","json_url":"https://newruntime.com/topics/evals.json"},{"type":"topic","path":"/topics/open-source/","url":"https://newruntime.com/topics/open-source/","title":"Open Source","reason":"Explore the open-source topic hub.","media_type":"text/html","markdown_url":"https://newruntime.com/topics/open-source.md","json_url":"https://newruntime.com/topics/open-source.json"},{"type":"collection","path":"/posts/","url":"https://newruntime.com/posts/","title":"Field Notes","reason":"Open the latest editorial analysis.","media_type":"text/html","json_url":"https://newruntime.com/posts.json"},{"type":"collection","path":"/source-ledger.json","url":"https://newruntime.com/source-ledger.json","title":"Source Ledger","reason":"Inspect the public source evidence graph.","media_type":"application/json"}]}