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What is SERA?

Open Coding Agents represent an innovative collection of fully accessible, high-performance AI coding models, accompanied by a training approach developed by the Allen Institute for AI, aimed at streamlining the creation, customization, and training of coding agents across various repositories in a manner that is both economical and transparent; this platform integrates models, coding frameworks, training methodologies, and tools that require minimal configuration to empower users to tailor agents for their unique codebases and engineering practices, addressing a wide range of tasks such as code generation, review, debugging, maintenance, and explanation. By moving away from traditional closed and expensive systems, these agents establish an open framework that encompasses everything from models to training data, enabling fine-tuning on proprietary code, which aids agents in grasping organization-specific APIs, patterns, and workflows; the initial offering, known as SERA (Soft-verified Efficient Repository Agents), raises the bar for coding benchmarks while operating at a markedly lower computational cost than standard alternatives, thus highlighting the possibilities for groundbreaking advancements in AI-driven coding solutions. As the coding environment grows more intricate, the launch of these models not only democratizes access to sophisticated coding support but also fosters an environment conducive to a more streamlined and effective development process, ultimately benefiting developers and organizations alike.

What is GPT‑5.3‑Codex‑Spark?

GPT-5.3-Codex-Spark is a specialized, ultra-fast coding model designed to enable real-time collaboration within the Codex platform. As a streamlined variant of GPT-5.3-Codex, it prioritizes latency-sensitive workflows where immediate responsiveness is critical. When deployed on Cerebras’ Wafer Scale Engine 3 hardware, Codex-Spark delivers more than 1000 tokens per second, dramatically accelerating interactive development sessions. The model supports a 128k context window, allowing developers to maintain broad project awareness while iterating quickly. It is optimized for making minimal, precise edits and refining logic or interfaces without automatically executing additional steps unless instructed. OpenAI implemented extensive infrastructure upgrades—including persistent WebSocket connections and inference stack rewrites—to reduce time-to-first-token by 50% and cut client-server overhead by up to 80%. On software engineering benchmarks such as SWE-Bench Pro and Terminal-Bench 2.0, Codex-Spark demonstrates strong capability while completing tasks in a fraction of the time required by larger models. During the research preview, usage is governed by separate rate limits and may be queued during peak demand. Codex-Spark is available to ChatGPT Pro users through the Codex app, CLI, and VS Code extension, with API access for select design partners. The model incorporates the same safety and preparedness evaluations as OpenAI’s mainline systems. This release signals a shift toward dual-mode coding systems that combine rapid interactive loops with delegated long-running tasks. By tightening the iteration cycle between idea and execution, GPT-5.3-Codex-Spark expands what developers can build in real time.

Media

Media

Integrations Supported

Claude Code
Codex CLI
Codex Security
Microsoft Foundry
NVIDIA DRIVE
OpenAI
OpenAI Codex
OpenClaw

Integrations Supported

Claude Code
Codex CLI
Codex Security
Microsoft Foundry
NVIDIA DRIVE
OpenAI
OpenAI Codex
OpenClaw

API Availability

Has API

API Availability

Has API

Pricing Information

Free
Free Trial Offered?
Free Version

Pricing Information

Pricing not provided.
Free Trial Offered?
Free Version

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Company Facts

Organization Name

Ai2

Date Founded

2014

Company Location

United States

Company Website

allenai.org/blog/open-coding-agents

Company Facts

Organization Name

OpenAI

Date Founded

2015

Company Location

United States

Company Website

openai.com

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