Model changes in AI coding tools

New models arriving, defaults switching and old models being retired across every AI coding tool we track. 35 logged so far, covering 13 tools.

Friday, November 13, 2026

Antigravity CLImodelAntigravity CLI 1.5.8 adds Gemini 4 Hydrogen and Carbon, with two security fixesGemini 4 Hydrogen and Carbon arrive in the CLI's model picker, alongside fixes for a sandbox proxy bypass and Windows allow-rule bypasses.CopilotmodelCopilot will drop six models, including Claude Fable 5, on December 14GitHub is removing six models from every Copilot experience on December 14, 2026, so pinned workflows need moving to the replacements.

Thursday, November 12, 2026

AmpmodelAmp replaces its Dial with a per-thread model selectorAmp's low/medium/high/ultra modes are gone; you now pick a model and effort for each thread.

Monday, November 9, 2026

Claude CodemodelClaude Fable 5.2 becomes Claude Code's default Fable modelClaude Code 2.1.321 adds Fable 5.2 as the default Fable model, and saved Fable 5.1 picks move over automatically.

Friday, October 30, 2026

Claude CodemodelFast mode for Opus 4.8 is deprecated and ends November 30Fast mode on Claude Opus 4.8 stops working on November 30, 2026; requests will error rather than fall back.

Tuesday, October 27, 2026

Gemini CLImodelGemini CLI now warns it isn't optimized for Gemini 4Gemini CLI 0.66.0 adds a banner saying it isn't tuned for the Gemini 4 models, and the project points Gemini 4 users to Antigravity CLI.

Monday, October 26, 2026

ClinemodelCline 4.1.26 changes default models and adds a model setting for cloud tasksWith no model chosen, the Cline provider goes back to Claude Sonnet 5.5, ClinePass now defaults to Kimi K3.1 Pro, and most other providers get new defaults.CodexmodelGPT-6.1 Terra arrives in Codex on paid ChatGPT plansA faster, more efficient model, GPT-6.1 Terra, is now available in Codex on Plus, Pro, Business, Enterprise and Edu.

Monday, October 19, 2026

CopilotmodelCopilot retires GPT-5.5, GPT-5.4, GPT-5 mini, Grok 4.5 and Gemini 3.7 FlashSix models were removed from most Copilot experiences on October 19, 2026, as announced in September.

Wednesday, October 14, 2026

CodexmodelGPT-5.5 retired from Codex for ChatGPT sign-inCodex users signed in with ChatGPT can no longer select GPT-5.5, so saved configs that name it need updating.KiromodelClaude Sonnet 4 reaches end of life in KiroKiro retired Claude Sonnet 4 on October 14, 2026.

Tuesday, October 13, 2026

Antigravity CLImodelGemini 4 Argon arrives in Antigravity and Antigravity CLIGoogle made Gemini 4 Argon available in the Antigravity app and CLI for Google AI Pro/Ultra and eligible Enterprise users.

Wednesday, October 7, 2026

Claude CodemodelClaude Haiku 5.5 becomes Claude Code's default Haiku modelClaude Code 2.1.293 switches its default Haiku model to Haiku 5.5 on the Anthropic API.

Tuesday, September 29, 2026

CodexmodelGPT-6.1 Sol arrives in CodexGPT-6.1 Sol launched in Codex and ChatGPT Work, with close to GPT-6 Astra performance at a lower cost.

Monday, September 28, 2026

Claude CodemodelClaude Sonnet 5.5 becomes Claude Code's default Sonnet modelClaude Code 2.1.284 switched its default Sonnet model to Sonnet 5.5 on the Anthropic API.

Tuesday, September 22, 2026

Claude CodemodelClaude Opus 5.5 arrives and becomes the default on Pro and Team StandardClaude Code 2.1.280 added Opus 5.5 as the default Opus model and switched Pro and Team Standard plans from Sonnet to Opus by default.CodexmodelGPT-6 Sol and GPT-6 Luna roll out to CodexTwo new models arrived in Codex and ChatGPT Work at lower token prices than the GPT-5.6 models they replace.CopilotmodelClaude Opus 5.5 rolls out in GitHub CopilotClaude Opus 5.5 is available to Copilot Pro+, Max, Business and Enterprise across GitHub's IDEs, CLI and cloud agent.

Monday, September 21, 2026

CursormodelGrok 4.7 lands in Cursor at Grok 4.6's price, with a 500k long-context modeCursor added Grok 4.7, its most capable Grok model for long coding work, at the same price and speed as Grok 4.6.DevinmodelCognition's SWE-2 model enters research preview in DevinSWE-2, Cognition's next-generation coding model, appeared in Devin's agent selector as an opt-in preview.

Tuesday, September 15, 2026

Augment CodemodelAugment retires DeepSeek V4 Flash, GLM 5.2 and Kimi K2.7 CodeThree open-weight models left Augment’s model pickers, with newer versions named as replacements.

Monday, September 14, 2026

CodexmodelOpenAI schedules GPT-5.5 retirement and removes Codex-SparkOpenAI announced GPT-5.5 would leave ChatGPT, Work and Codex on October 14, and removed the GPT-5.3-Codex-Spark preview the same day.

Friday, September 4, 2026

CodexmodelCodex CLI 0.153.4 makes GPT-6 Astra the default when no model is setA run of CLI releases brought in GPT-6 Astra, and 0.153.4 made it the built-in default for configs that don't name a model.

Tuesday, September 1, 2026

Claude CodemodelFable 5.1 becomes the default Fable model; repo-level bypass mode is ignoredClaude Code 2.1.257 switched the Fable alias to Fable 5.1 and closed a repository-settings route into bypass-permissions mode.

Wednesday, August 12, 2026

CursormodelGrok 4.6 arrives in Cursor at $2 / $6 per million tokensCursor and SpaceXAI released Grok 4.6, aimed at long-running agents and more ambitious interactive and visual work.

Friday, August 7, 2026

FactorymodelFactory's Auto model can now route to Claude Opus 5Factory’s automatic model picker added Claude Opus 5.

Friday, July 31, 2026

CodexmodelOpenAI schedules GPT-5.4 and GPT-5.4 mini to leave Codex on August 31Both GPT-5.4 models would stop working in Codex sessions signed in with ChatGPT on August 31, 2026.

Monday, July 27, 2026

ZedmodelZed 1.12.1 adds Claude Opus 5 for bring-your-own-key usersZed added Claude Opus 5 to its Anthropic and Amazon Bedrock bring-your-own-key providers.

Friday, July 24, 2026

Claude CodemodelClaude Opus 5 becomes the default Opus model; Opus 4.7 loses fast modeClaude Code 2.1.219 added Opus 5 with a 1M context window and changed which models support fast mode.CopilotmodelClaude Opus 5 rolls out to Copilot Pro+, Max, Business and EnterpriseAnthropic's Claude Opus 5 started rolling out across Copilot's IDEs, CLI, app and web on higher-tier plans.

Tuesday, July 14, 2026

KiromodelOpenAI models come to Kiro for the first time: GPT-5.6 Sol, Terra and LunaKiro added its first OpenAI models in three cost tiers, each with its own credit multiplier.

Thursday, July 9, 2026

AmpmodelAmp swaps its smart, deep and rush modes for a low-to-ultra DialAmp folded its model-named modes into four effort levels: low, medium, high and ultra.CodexmodelGPT-5.6 Sol, Terra and Luna become generally available in CodexOpenAI made the three-tier GPT-5.6 family generally available in Codex, ChatGPT and the API.

Tuesday, June 30, 2026

Claude CodemodelClaude Sonnet 5 becomes Claude Code's default model (2.1.197)Sonnet 5 arrived as the new default model in Claude Code, with a 1M-token context window and promotional pricing.

Tuesday, June 9, 2026

Claude CodemodelClaude Fable 5 launches, included in paid plans only until June 22Anthropic released Fable 5, with a short included window on paid plans before usage credits became required.