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Changelog

What's coming next and what shipped recently.

Up Next

  • Research agents
  • GEPA for coding agents
  • GitHub Actions

Latest Updates

Sep 28, 2026
synth-indexapimcprelease

Synth Index alpha v0.1

Search reviewed research with Fast and Deep Search from the API, the Python SDK, or MCP. Sign up, get an API key, and pay per search.

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Jul 13, 2026
managed-researchresearch-factorycraftaxfactorybench

Research Factory With Held-Out Craftax Proof

Research Factory adds typed research and maintenance cycles, immutable candidates, and benchmark-owned grading through synth-ai 0.15.0.

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Jul 2, 2026
stackrelease

Stack releases

Stable and nightly Stack releases with what shipped in each.

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Jul 1, 2026
stackagentsmonitor

Stack sidecar monitor — a separate stream for long agent runs

Goal mode in Stack now defaults to a Sidecar events feed: a monitor agent that narrates progress, audits done-claims, and steers the worker — instead of reading every tool call.

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Jun 26, 2026
gelohosted-optimizersgamebenchpromo

GELO hosted optimizer — 72-hour free promo

Hosted GELO relaunches with a 72-hour proposer-spend promo, GameBench Rust smoke presets, and invite-only plugin lane copy.

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Jun 25, 2026
managed-researchxaigroklaunch

Managed Research: Direct xAI Grok Build

Hosted SMR runs on Grok Build over direct xAI, with a simplified public Grok catalog and synth-ai 0.11.7.

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Jun 18, 2026
open-researchmanaged-researchresearch-factorylaunch

Open Research Factory Production Proof

Open Research Factory now publishes a production proof run with a receipt, artifact bundle, and private-work firewall.

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Jun 11, 2026
gelohosted-optimizersprompt-optimizationpromo

GELO Hosted Optimizer Launch Promo

Hosted GELO is available for checkpoint-native long-horizon optimization, with a launch promo for hosted proposer spend.

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Feb 20, 2026
managed-researchhorizonsbillinggepamipro

Managed Research Launch, Horizons Agent Runtime

Friday product updates for February 20, 2026.

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Feb 13, 2026
gepahorizonsauthenticationwebhooksconfig

Horizons v0.1.2: Production Ready

Friday product updates for February 13, 2026.

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Feb 7, 2026
horizonsopen-sourceenvironment-poolsrlmmipro

Horizons OSS Launch, Environment Pools, RLM v1 & MIPRO Offline

Friday product updates for February 7, 2026.

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Feb 6, 2026
environment-poolsharborbrowsergepainfrastructure

Environment Pools

Friday product updates for February 6, 2026.

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Jan 29, 2026
tunnelssynthtunneldeployharborgepa

SynthTunnel, Deploy & Harbor, Event Fixes

Friday product updates for January 29, 2026.

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Jan 23, 2026
reliabilitytracestunnelsgepa

Reliability: Trace Uploads, Tunnel DNS, Rollout Stability

Friday product updates for January 23, 2026.

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Jan 17, 2026
gepacoding-agentscodexopencodeagents-md

GEPA for Coding Agents

Friday product updates for January 17, 2026.

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Jan 10, 2026
pricingbyoktuisdkimage-gen

Pro & Team Plans, Image-Gen Support

Friday product updates for January 10, 2026.

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Jan 2, 2026
sdkverifiersgraphsnaming

Verifier-First Naming & SDK Alignment

Friday product updates for January 2, 2026.

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Dec 26, 2025
localapirolloutstracessdkgspo

LocalAPI Simplification & Trace-First Rollouts

Friday product updates for December 26, 2025.

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Dec 19, 2025
graphs-apigraphgenverifiersrlmmonitoring

Graphs API, Graph Gen Workflows & Verifier Graphs

Friday product updates for December 19, 2025.

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Dec 12, 2025
graph-optimizationevolveworkflowssdkapi

Graph Evolve: Optimize LLM Workflow Graphs

Automatically evolve multi-step LLM workflows with evolutionary optimization.

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Dec 5, 2025
pricingrate-limitsmiprogepasse

Free Tier, Rate Limits & Visualization Updates

Friday product updates for December 5, 2025.

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Nov 28, 2025
researchpolyglotautomationmipro

Research Agents & Language-Agnostic Optimization

Friday product updates for November 28, 2025.

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Nov 21, 2025
task-appsgepamiprogeminiexamples

In-Process Task Apps, Gemini 3 & Production Examples

Friday product updates for November 21, 2025.

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Nov 14, 2025
cliartifactsqueuepricingtunnels

Artifacts CLI, Experiment Queue & Session Pricing

Friday product updates for November 14, 2025.

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Nov 7, 2025
multi-stagegepamiprogeminiopenai

Multi-Stage Optimizers & GEPA Algorithm

Friday product updates for November 7, 2025.

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Oct 31, 2025
traininglogsverifiersqwen-vlrl

Terminal Training Logs & Qwen-VL RL

Friday product updates for October 31, 2025.

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Oct 17, 2025
qwentursoh200rllora

Qwen Coder, Turso & H200 Topologies

Friday product updates for October 17, 2025.

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Oct 10, 2025
loramoeqwenlarge-models

LoRA, MoE & Large Model Support

Friday product updates for October 10, 2025.

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Sep 26, 2025
platformgpuinference

Platform Updates

Friday product updates for September 26, 2025.

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Sep 19, 2025
rlonlinetask-apps

Online RL (customer-visible features)

Friday product updates for September 19, 2025.

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Aug 8, 2025
sdksftcli

SDK Releases 0.2.2.dev1 & 0.2.2.dev2

Friday product updates for August 8, 2025.

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Aug 1, 2025
sdkenvironmentturso

SDK Releases 0.2.1.dev1 & 0.2.2.dev0

Friday product updates for August 1, 2025.

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