Cursor trained Composer 2 end to end on Nebius infrastructure. At Nebius Inflection in June 2026, the company said it supplied B300 GPUs for Cursor's large reinforcement-learning jobs and identified Cursor as its first customer to adopt B300 at scale. Nebius had announced Cursor as a customer in 2025, before publicly naming Composer 2 and the B300 training work. In its Composer 2 launch announcement, Cursor said its first continued pretraining run provided a stronger base for scaling reinforcement learning.
The London Institute for Mathematical Sciences also names Cursor among organizations Nebius assists with training and deploying frontier models at scale.
19:48: Slide identifies Composer 2 as end-to-end trained and Cursor as the first B300 adopter at scale. Roman Chernin describes B300 access for large reinforcement-learning tasks.
Nebius Inflection 2026 · 19:4819 Jun 2026 · Nebius · Video · Starts at 19:4819:48: Slide identifies Composer 2 as end-to-end trained and Cursor as the first B300 adopter at scale. Roman Chernin describes B300 access for large reinforcement-learning tasks.
Learn AI for maths | LIMS
18 Oct 2026 · lims.ac.uk · Web page
The London Institute for Mathematical Sciences names Cursor among organizations Nebius assists with training and deploying frontier models at scale.
Learn AI for maths | LIMS18 Oct 2026 · lims.ac.uk · Web pageThe London Institute for Mathematical Sciences names Cursor among organizations Nebius assists with training and deploying frontier models at scale.
Nebius Q3 2025 shareholder letter
11 Nov 2025 · Nebius · PDF
Q3 2025 shareholder letter: startup onboarded. A later Nebius company post explicitly calls Cursor a customer, and a sales leader says Nebius contributed to Composer 2.
Nebius Q3 2025 shareholder letter11 Nov 2025 · Nebius · PDFQ3 2025 shareholder letter: startup onboarded. A later Nebius company post explicitly calls Cursor a customer, and a sales leader says Nebius contributed to Composer 2.
Nebius customer statement
19 Nov 2025 · LinkedIn · Nebius customer statement · Web page
Nebius describes its relationship with Cursor in a company post.
Nebius Group (NBIS) Q4 2025 Earnings Results & Call Transcript12 Feb 2026 · www.marketbeat.com · Web pageArkady Volozh names Cursor among Nebius’s AI-native customers while discussing its AI Cloud business.
Cursor, developed by Anysphere, makes AI software development tools for individual programmers and engineering teams. Its desktop code editor helps users understand codebases, generate and edit code, and delegate implementation tasks to AI agents. Its main products include Cursor Desktop, a terminal CLI, cloud agents that build and test changes on separate computers, and code review tools. Integrations let teams assign work through Slack and review pull requests in GitHub. Enterprise offerings support organizations deploying these tools across engineering teams.
Cursor adds cloud agent canvases and a beta Environments API
Cloud agents can now create interactive canvases that users can share by link. A new beta Environments API lets developers create and manage cloud environments programmatically.
Muse Wonder is available in Cursor for agentic coding, including multi-step debugging and large-repository work. Pricing is $4 per million input tokens and $20 per million output tokens.
JetBrains releases stable Java and Kotlin extension built with Cursor
Java and Kotlin by IntelliJ IDEA 1.0 brings code analysis, navigation, refactoring and debugging to Cursor. The extension was developed with Cursor and requires an IntelliJ IDEA Ultimate subscription after a 30-day trial.
Cursor trained Composer 2 end to end on Nebius infrastructure. At Nebius Inflection in June 2026, the company said it supplied B300 GPUs for Cursor's large reinforcement-learning jobs and identified Cursor as its first customer to adopt B300 at scale. Nebius had announced Cursor as a customer in 2025, before publicly naming Composer 2 and the B300 training work. In its Composer 2 launch announcement, Cursor said its first continued pretraining run provided a stronger base for scaling reinforcement learning.
The London Institute for Mathematical Sciences also names Cursor among organizations Nebius assists with training and deploying frontier models at scale.
19:48: Slide identifies Composer 2 as end-to-end trained and Cursor as the first B300 adopter at scale. Roman Chernin describes B300 access for large reinforcement-learning tasks.
Nebius Inflection 2026 · 19:4819 Jun 2026 · Nebius · Video · Starts at 19:4819:48: Slide identifies Composer 2 as end-to-end trained and Cursor as the first B300 adopter at scale. Roman Chernin describes B300 access for large reinforcement-learning tasks.
Learn AI for maths | LIMS
18 Oct 2026 · lims.ac.uk · Web page
The London Institute for Mathematical Sciences names Cursor among organizations Nebius assists with training and deploying frontier models at scale.
Learn AI for maths | LIMS18 Oct 2026 · lims.ac.uk · Web pageThe London Institute for Mathematical Sciences names Cursor among organizations Nebius assists with training and deploying frontier models at scale.
Nebius Q3 2025 shareholder letter
11 Nov 2025 · Nebius · PDF
Q3 2025 shareholder letter: startup onboarded. A later Nebius company post explicitly calls Cursor a customer, and a sales leader says Nebius contributed to Composer 2.
Nebius Q3 2025 shareholder letter11 Nov 2025 · Nebius · PDFQ3 2025 shareholder letter: startup onboarded. A later Nebius company post explicitly calls Cursor a customer, and a sales leader says Nebius contributed to Composer 2.
Nebius customer statement
19 Nov 2025 · LinkedIn · Nebius customer statement · Web page
Nebius describes its relationship with Cursor in a company post.
Nebius Group (NBIS) Q4 2025 Earnings Results & Call Transcript12 Feb 2026 · www.marketbeat.com · Web pageArkady Volozh names Cursor among Nebius’s AI-native customers while discussing its AI Cloud business.
Cursor, developed by Anysphere, makes AI software development tools for individual programmers and engineering teams. Its desktop code editor helps users understand codebases, generate and edit code, and delegate implementation tasks to AI agents. Its main products include Cursor Desktop, a terminal CLI, cloud agents that build and test changes on separate computers, and code review tools. Integrations let teams assign work through Slack and review pull requests in GitHub. Enterprise offerings support organizations deploying these tools across engineering teams.
Cursor adds cloud agent canvases and a beta Environments API
Cloud agents can now create interactive canvases that users can share by link. A new beta Environments API lets developers create and manage cloud environments programmatically.
Muse Wonder is available in Cursor for agentic coding, including multi-step debugging and large-repository work. Pricing is $4 per million input tokens and $20 per million output tokens.
JetBrains releases stable Java and Kotlin extension built with Cursor
Java and Kotlin by IntelliJ IDEA 1.0 brings code analysis, navigation, refactoring and debugging to Cursor. The extension was developed with Cursor and requires an IntelliJ IDEA Ultimate subscription after a 30-day trial.
