Kiro

September 30, 2026 Introducing Workflows in Kiro Web Run reusable, multi-step agent plans in Kiro Web cloud sessions, inspect and guide every step, and keep working in the parent conversation. Workflows are now available as an opt-in feature in Kiro Web cloud sessions. They run reusable, multi-step agent plans in the background while you continue working in the parent conversation. Start a Workflow from the conversation Describe the outcome and how much structure or review you want. Kiro proposes a Workflow, names its steps, agents, and effort, and launches it in the background. Ask Kiro to investigate a codebase for risks, deliver a feature with independent reviewers, or make a failing build green. Each step runs in its own agent session, which you open from the Workflows panel; it sees only what earlier steps hand it, and the run pauses when a step needs your input. Start with one of three bundled recipes: investigate for read-only investigation, feature-pipeline for staged feature delivery, or publish-pr for opening a pull request and handling review feedback. Learn more -> Follow and guide each step

September 28, 2026 Claude Opus 5.5 Now Available Claude Opus 5.5 brings stronger agentic coding and clearer communication than Opus 5 at a 2.0x credit multiplier, down from Opus 5's 2.2x. Claude Opus 5.5 is now available with experimental support across the Kiro IDE, CLI, Crew, and Web for Pro, Pro+, Pro Max, and Power customers in us-east-1 (IAD) and eu-central-1 (FRA). Anthropic reports stronger performance on long, complex coding tasks and clearer communication than prior models. Claude Opus 5.5 includes a 1M-token context window and has a 2.0x credit multiplier . To load the latest model list, restart the IDE or CLI, run kirocrew restart for Crew, or refresh Web in your browser. Learn more -> { PREVIOUS } Claude Opus 5 Now Available { NEXT } Claude Opus 4.8 Now Available

September 24, 2026 Live Settings, Durable Work, and Broader Pull Request Watches 0.7.0 Kiro Crew 0.7.0 makes day-to-day work more durable and easier to control. Most settings apply as soon as you save them, accepted background work survives Gateway restarts, and updates wait for active work to finish. Long chats gain a turn minimap, clearer tool-call titles, and direct model and reasoning controls, while pull request watches expand to GitLab, Bitbucket Cloud, and Azure DevOps Services. Windows gets isolated pods and a faster Gateway start, and Preview users can choose more agent backends, let Jev route individual turns, or run remote crews on AWS Fargate. Settings That Apply While You Work Most settings now reach the running Gateway as soon as you save config.json or change a value in Settings. Fields that still need a restart identify themselves in the UI; the Slack slash-command field is the current boot-only setting and carries a Changes need a restart badge. Learn more -> Chat That Keeps Up With You

September 21, 2026 Reasoning Controls and Cloud Sessions 2.23.0 Configure thinking and effort from /model and start V3 cloud sessions before connecting a repository. This release brings reasoning controls into /model and lets V3 cloud sessions start before you connect a repository. Improvements add clearer live progress, smoother streaming, and more efficient fullscreen scrolling. Reliability fixes cover models, sessions, tools, and non-interactive runs. Reasoning controls in /model Open /model to switch models and configure the selected model's thinking and effort in one place. The panel shows only the options supported by that model and saves your choices for future sessions. /model is now the primary interface for reasoning settings. In V2, bare /effort is a legacy command: it shows a deprecation warning and opens the Effort setting in /model ; /effort <level> remains supported. In V3, /effort continues to open its own picker. Learn more -> Cloud sessions before repository connection (V3)

September 16, 2026 Fullscreen Chat and Streamlined Sessions 2.22.0 Expand chat to a dedicated terminal screen, browse a streamlined V3 session dashboard, and keep long sessions running reliably. This release adds fullscreen chat for interactive TUI and Lite sessions, streamlines the V3 session dashboard, and improves reliability during long-running work. Fullscreen chat Type /fullscreen to move the current conversation to a dedicated terminal screen with its own scrollable view, independent of your shell history. Type /fullscreen again to return inline. Fullscreen is available in interactive TUI and Lite sessions on both V2 and V3. Scroll with your mouse, touchpad, or keyboard, and click and drag to copy selected text. To start future interactive TUI sessions in fullscreen, open /settings , choose Display , and turn on Start fullscreen . Learn more -> Streamlined session dashboard (V3) /sessions now separates search, filter, sort, and grouping controls from the session list. It opens as a flat list ordered by last use, supports sorting by last use, session name, or message count, and remembers your selection. Use Tab to move between the controls and results. Learn more ->

September 16, 2026 Claude Fable 5.1 Preview Begins Rolling Out to Kiro Enterprise Claude Fable 5.1 is beginning to roll out in Preview across Kiro clients for Kiro Enterprise organizations. Anthropic's most capable agentic coding model traces problems to root causes, maintains context and intent across complex tasks, and improves reliability for multi-file refactors and long autonomous runs. It has a 1M context window and a 6x credit multiplier. Inference runs only in US East (N. Virginia) ( us-east-1 ). Availability is limited during the Preview rollout. Organizations with access can enable Fable 5.1 through model governance. After model access management is enabled, administrators can add Fable 5.1 from Manage approved list and make it available to their users. All Fable 5.1 traffic is retained for up to 30 days (unless otherwise required by law) for automated offline abuse detection. Classifier-flagged traffic will be subject to potential human review performed by AWS, and we may review flagged traffic for abuse. Learn more -> { PREVIOUS } Claude Opus 4.5 support for AWS IAM Identity Center users

September 14, 2026 Agent Artifacts and Native ARM64 Builds 1.1 IDE 1.1 lets agents produce durable artifacts you can review and return to, adds native ARM64 builds for Windows and Linux, and updates the editor foundation to Code OSS 1.131. Compacted conversations retain the right context, MCP failures are clearer, Hooks are more reliable, and enterprise profiles route requests to the selected region. Review agent-created artifacts Kiro can turn documents, diagrams, code, images, and other agent outputs into durable artifacts instead of leaving them buried in the chat transcript. Open a compact preview from the conversation, review the full artifact beside the chat in Agent Focus, or return to it from the Agent Focus context panel. Learn more -> Install Kiro natively on ARM64 Install native ARM64 builds for Windows and Linux instead of relying on x64 emulation. Choose the ARM64 download for your platform from the Kiro downloads page . Recent IDE 1.0 highlights These capabilities shipped earlier in the IDE 1.0 release line and are included here for context.

September 14, 2026 GPT-5.6 Sol, Terra, and Luna upgraded to 1M context window GPT-5.6 Sol, Terra, and Luna now support a 1M token context window, up from 272K, in the Kiro IDE , CLI , and Web . Entire codebases, long-form documents, and extended multi-turn agent histories fit in a single request, so repository-scale refactors, end-to-end debugging, and long-horizon agentic tasks run without chunking or losing earlier context. Credit multipliers for the GPT-5.6 family are updated with this launch and follow the two-tier context model OpenAI and Amazon Bedrock use: requests up to 272K tokens bill at the short context rate (Sol 4.4x, Terra 2.2x, Luna 1.1x), and requests above 272K tokens bill at double that rate. 1M context is rolling out gradually with experimental support to Kiro Pro, Pro+, Pro Max, and Power customers. Restart your IDE or CLI, or refresh Kiro Web, to see the updated models. Learn more -> { PREVIOUS } GPT‑5.6 update: lower credit multipliers for Terra and Luna { NEXT } GLM-5 Now Available in Kiro

September 5, 2026 Remote Crews, Agent Harnesses, and Apps Launchpad 0.6.0 Kiro Crew 0.6.0 lets you choose the harness behind a session, start work on a connected remote crew, and let crew members dispatch workers of their own. Chat is quieter and easier to resume, long-running work gets more room to finish, and Apps adds a Launchpad for the tools you install. Python 3.12 is now the minimum supported version. Before You Upgrade A few changes need your attention before updating:

• Python 3.12 is now required. Hosts on Python 3.10 or 3.11 must upgrade before installing or updating. The installer provisions its own pinned Python when needed; pass --system-python only when you deliberately want to use your system interpreter.
• Keep the sandbox enabled if you rely on the command gate. Credential-path protection no longer relies on command-text inspection. Check that agent.sandbox in config.json is not off .
• Unattended auto-run plans stop after two hours by default. Raise orchestrator.max_plan_duration_seconds in config.json , or set it to 0 to remove the ceiling. Stage-gated plans are not cut off.