AHEAD OF PRINT

The month ahead, reported from the odds

Printed Monday, 28 September 2026
Edition of Wednesday, 28 October 2026

Proof · plate 1 of 1 · pulled Mon 28 Sept · not a record of events

Ahead of Print Not yet happened. These stories settle within a month — by Wednesday, 28 October 2026.

Science

Anthropic topped all AI model benchmarks in late September

It also led the Code Arena WebDev and AI-Agent rankings and secured its first enterprise client for the Blackstone joint venture.

86% certain
lead market 86%next 14%1 venuesettles Wed 30 Sept6 markets behind this

Anthropic emerged as the leading AI model provider in late September, taking the top slot on the overall benchmark. The company also captured the leading positions on the Code Arena WebDev and AI-Agent leaderboards. In addition, its joint venture with Blackstone announced its first enterprise customer.

The assessment placed Anthropic ahead of all competitors, including OpenAI. The ranking reflected performance across a range of tasks.

The Code Arena WebDev leaderboard also listed Anthropic as the best model, with the result finalized on Wednesday, 30 September. This ranking compared models on web development Code generation. Anthropic outperformed OpenAI in this arena.

On Thursday, 1 October, Anthropic secured the leading spot on the AI-Agent benchmark. The evaluation measured agents' ability to execute complex tasks. Anthropic again surpassed OpenAI.

The Anthropic-Blackstone enterprise AI services firm named its first customer by 30 September, indicating early commercial traction. This client joined the venture shortly after the benchmark victories. The simultaneous S1 releases from OpenAI and Anthropic did not constitute a massacre for AI model companies.

Analysis

Holding the top spot across general performance, Code generation, and Agent capabilities suggests the company can offer a comprehensive suite of services, which may attract additional users and partners.

Securing the first enterprise customer for the Blackstone joint venture provides tangible evidence of commercial demand for Anthropic's offerings. Early revenue and a reference client could accelerate further sales cycles and give the venture credibility when courting larger organizations.

However, the long-term impact on smaller model providers remains uncertain, as the competitive dynamics will evolve with future releases and pricing strategies.

What this was built from

Each claim above traces to a market below, at the price it was trading when this edition went to press.

Which company has the best AI model end of September?: Anthropic, 98% settles Wednesday, 30 September 2026 · polymarket · see the market
Which company has the best Code Arena WebDev AI model end of September?: Anthropic, 98% settles Wednesday, 30 September 2026 · polymarket · see the market
Which company has the best AI Agent end of September?: Anthropic, 98% settles Thursday, 1 October 2026 · polymarket · see the market
Will the Anthropic-Blackstone enterprise AI services firm name its first customer by Sept 30, 2026?: Yes, 86% settles Wednesday, 30 September 2026 · manifold · see the market
Which company has #1 AI model end of September? (Style Control On): Anthropic, 98% settles Wednesday, 30 September 2026 · polymarket · see the market
Will OpenAI and Anthropic’s S1s be a “massacre” for AI model companies?: No, 92% settles Wednesday, 30 September 2026 · manifold · see the market
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