Infra2026-06-26 · source-backed

Baseten raised $1.5B at up to $13B as inference becomes the contested layer.

Issue

2026-06-26

Confidence

source-backed

Sources

Redaction

passed

Story

Baseten's Series F closed June 22 led by Altimeter, Conviction, and Spark, with revenue up ~20x YoY and more than 1 billion inference calls a day across 87 clusters and 18 clouds. The model layer gets the headlines, but inference at the app layer is where this round says the money is.

Altimeter invested in Baseten / Shared entity: Baseten / Shared topic / What happened next
Vercel AI Gateway adds Kimi K3 with US-hosted providers and Zero Data Retention.
Linked by a graph relationship (Altimeter invested in Baseten); both cover Baseten; overlapping topics (baseten, model).
Altimeter invested in Baseten / Shared entity: Baseten / What happened next
GitHub Adds Kimi K3 to Copilot as Containment Report Surfaces
Linked by a graph relationship (Altimeter invested in Baseten); both cover Baseten; picks up the Baseten thread on 2026-08-07.
Altimeter invested in Thrive Holdings / Shared entity: Altimeter / Shared topic / What happened next
Thrive Holdings raised $2B to buy services businesses instead of selling them software.
Linked by a graph relationship (Altimeter invested in Thrive Holdings); both cover Altimeter; overlapping topics (altimeter, closed).
Conviction invested in Intelligence / Shared entity: Conviction / Shared topic / What happened next
DesignArena parent raises $7.9M after hitting $60M ARR
Linked by a graph relationship (Conviction invested in Intelligence); both cover Conviction; overlapping topics (becom, conviction).
Altimeter invested in Baseten / Shared entity: Baseten / Shared topic / Earlier coverage
Baseten closed ~$1.5B on June 19, more capital flowing to the layer beneath the apps.
Linked by a graph relationship (Altimeter invested in Baseten); both cover Baseten; overlapping topics (baseten, closed).
Microsoft AI ships seven in-house MAI models, including an Excel-tuned variant that matches GPT-5.4 at 10x efficiency.
Linked by a graph relationship (Altimeter invested in Baseten); both cover Baseten; overlapping topics (baseten, model).
Altimeter invested in Baseten / Shared entity: Baseten / What happened next / Tension
Baseten made GLM 5.2 20% faster by quantizing more layers
Linked by a graph relationship (Altimeter invested in Baseten); both cover Baseten; picks up the Baseten thread on 2026-08-05.
Altimeter invested in Baseten / Shared entity: Baseten / What happened next
Thinking Machines Ships Inkling: 975B Open Weights, and It's Behind Two Chinese Labs
Linked by a graph relationship (Altimeter invested in Baseten); both cover Baseten; picks up the Baseten thread on 2026-07-16.

Source trail

Baseten's Series F

Entities

Altimeter Baseten Conviction Spark YoY

Provenance

Canonical issue: Ramsay Research Agent — June 26, 2026
AI generated: no
Story unit: 2026-06-26-baseten-raised-1-5b-at-up-to-13b-as-inference-becomes-the-contested-layer
Labels: source-backed, canonical briefing excerpt

Fetching from the wire…

Baseten raised $1.5B at up to $13B as inference becomes the contested layer.

Story

Related stories

Vercel AI Gateway adds Kimi K3 with US-hosted providers and Zero Data Retention.

GitHub Adds Kimi K3 to Copilot as Containment Report Surfaces

Thrive Holdings raised $2B to buy services businesses instead of selling them software.

DesignArena parent raises $7.9M after hitting $60M ARR

Baseten closed ~$1.5B on June 19, more capital flowing to the layer beneath the apps.

Microsoft AI ships seven in-house MAI models, including an Excel-tuned variant that matches GPT-5.4 at 10x efficiency.

Baseten made GLM 5.2 20% faster by quantizing more layers

Thinking Machines Ships Inkling: 975B Open Weights, and It's Behind Two Chinese Labs

Source trail

Entities

Provenance

Baseten raised $1.5B at up to $13B as inference becomes the contested layer.

Story

Related stories

Vercel AI Gateway adds Kimi K3 with US-hosted providers and Zero Data Retention.

GitHub Adds Kimi K3 to Copilot as Containment Report Surfaces

Thrive Holdings raised $2B to buy services businesses instead of selling them software.

DesignArena parent raises $7.9M after hitting $60M ARR

Baseten closed ~$1.5B on June 19, more capital flowing to the layer beneath the apps.

Microsoft AI ships seven in-house MAI models, including an Excel-tuned variant that matches GPT-5.4 at 10x efficiency.

Baseten made GLM 5.2 20% faster by quantizing more layers

Thinking Machines Ships Inkling: 975B Open Weights, and It's Behind Two Chinese Labs

Source trail

Entities

Provenance