Microsoft Azure vs Modal

Zendesk Names Rachita Sundar as CFO

Zendesk announced the appointment of Rachita Sundar as Chief Financial Officer, effective September 28, 2026. Sundar, who brings over 20 years of experience in finance and operations at technology companies including Microsoft Azure, HubSpot, and Qualtrics, succeeds Julie Swinney, who transitions to Chief Administrative Officer and executive sponsor of Zendesk's Employee Service business. At Qualtrics, Sundar helped finance and close the $6.75 billion acquisition of Press Ganey Forsta. CEO Tom Eggemeier highlighted her financial rigor and operational expertise as Zendesk scales toward a multi-billion-dollar AI business.

• Rachita Sundar appointed CFO of Zendesk, effective September 28, 2026.
• Sundar has over 20 years of experience at Microsoft Azure, HubSpot, and Qualtrics.
• At Qualtrics, Sundar helped finance and close the $6.75 billion acquisition of Press Ganey Forsta.

Anthropic Launches Claude Opus 5.5 Despite Slowdown Call

Anthropic released Claude Opus 5.5, its flagship AI model and the first in the 5.5 family, on September 22, 2026. It achieves the highest-ever score (58) on the Artificial Analysis Intelligence Index and leads six out of ten benchmarks, including outperforming OpenAI's GPT-6 Astra on Terminal-Bench 4.0. Priced at $4 per million input tokens and $20 per million output tokens (20% lower), it promises a 40% cost reduction for typical workloads, though savings depend on config. It is 30% faster, now defaults in Claude Code and the Claude app, and matches Claude Fable 5.1 on most tasks. Early tests show efficiency gains but also more concurrency issues and security test failures. Anthropic cites external safety evaluations, and OpenAI responded with GPT-6 Sol and Luna, priced ~50% lower and offering up to 90% cache discounts.

• Claude Opus 5.5 scores 58 on the Artificial Analysis Intelligence Index, the highest recorded, and leads six out of ten benchmarks.
• Pricing reduced to $4 per million input tokens, $20 per million output tokens, and cache reads at $0.20 per million tokens, promising a 40% cost reduction per task (though configuration may affect savings).
• Opus 5.5 is 30% faster, supports multi-agent scaling up to 100 parallel agents, and is now default in Claude Code and the Claude app.

Anthropic Launches Claude Fable 5.1 with Top AI Benchmarks

Anthropic launched Claude Fable 5.1 and its sibling Claude Mythos 5.1, showcasing improved performance in coding and knowledge work. Fable 5.1 achieved a record 66 on the Artificial Analysis Intelligence Index at maximum reasoning effort, surpassing previous top models. Anthropic slashed cache read prices by 75% to $0.25 per million tokens, claiming potential savings of up to 45% for agentic workloads, though actual per-task costs may rise due to higher token use. The models are available via the Claude API and major clouds including AWS, Google Cloud, and Microsoft Azure. Enterprise Frontier Safeguards enable customers to retain data in their own cloud with zero data retention, and invisible watermarking ensures compliance with the EU AI Act. Pro subscribers must pay extra for Fable 5.1, with Opus 5 remaining the best bundled option.

• Anthropic released Claude Fable 5.1 and Mythos 5.1, with Fable achieving a record 66 on the Artificial Analysis Intelligence Index.
• Cache read prices were reduced by 75% to $0.25 per million tokens, potentially cutting agentic workload costs by up to 45%.
• The models are available on the Claude API and major clouds (AWS, Google Cloud, Microsoft Azure).

Modal Hits $1B ARR, Raises $750M Series D at $15.75B Valuation

Modal, an AI infrastructure startup, announced it has crossed $1 billion in annualized run rate and raised a $750 million Series D round at a $15.75 billion valuation, led by Accel. The company's usage has tripled since its Series C and grown more than 15x year-over-year. Modal's Sandboxes product, launched in 2023 in response to developers using LLMs to generate code, has become a $300 million run rate product on its own, with nearly 3 billion sandboxes spun up and scaling to a million concurrent. The funding round marks Modal's transition from an infra unicorn to an infra decacorn, positioning it as a key player in the AI infrastructure space.

• Modal raised a $750M Series D at a $15.75B valuation, led by Accel.
• Modal crossed $1B in annualized run rate.
• Usage has tripled since Series C and grown over 15x year-over-year.

Runtime recap: the full keynote, VM Sandboxes, Modal Clusters, and more.

Modal announces a runtime product update with VM Sandboxes and Modal Clusters, as highlighted in a blog post.

Modal Labs closing in on $750M round at $15.75B valuation

AI inference infrastructure provider Modal Labs is nearing a $750 million funding round led by Accel at a $15.75 billion valuation, according to a source. This would more than triple its valuation from $4.65 billion in May. The round comes amid surging demand for inference services, with other startups like Baseten, Fireworks, and Fal also raising at higher valuations. Modal Labs, founded in 2021 by Erik Bernhardsson and Akshat Bubna, provides infrastructure for training and running AI models without managing servers. The company has surpassed $300 million in annualized revenue as of May. The funding talks follow a security incident in July where a customer's data was compromised, but Modal's platform was not breached.

• Modal Labs is nearing a $750 million funding round led by Accel at a $15.75 billion valuation.
• The round would more than triple Modal Labs' valuation from $4.65 billion in May.
• Modal Labs has surpassed $300 million in annualized revenue as of May.