AI Model Releases 2026: Complete Timeline Tracker

AI Model Releases 2026 Timeline

A chronological timeline of major AI model releases across 2025 and 2026 — LLMs, reasoning models, open-weights families, and image & video generators, each with its date, why it mattered, and the official announcement.

Newest model launches — live

Every new model on the OpenRouter API (GPT, Claude, Gemini, Grok, and 300+ more) appears here automatically with its exact launch date, plus trending open-weights releases from Hugging Face.

Fallback list (hand-picked) — last verified July 16, 2026.

Dec 2, 2025 · Mistral AI

Mistral 3
Open weights
Open-weights frontier family under Apache 2.0.
Nov 25, 2025 · Black Forest Labs

FLUX.2
Image gen
Production image generation and editing model.
Sep 29, 2025 · DeepSeek

DeepSeek-V3.2-Exp
Open weights
Sparse-attention experiment that halved DeepSeek API prices.
Aug 5, 2025 · OpenAI

gpt-oss
Open weights
OpenAI's 120B and 20B open-weights reasoning models.
Apr 29, 2025 · Alibaba

Qwen3
Open weights
Hybrid thinking family, 0.6B dense to 235B MoE.

Curated timeline of major releases

Hand-curated — last verified: July 16, 2026

2026 — the frontier race so far

Dates for API-first launches reflect first public API availability (via OpenRouter); official announcements linked where published.

Jul 9, 2026 · OpenAI

GPT-5.6 — Sol, Luna & Terra
Frontier LLM
OpenAI's three-track GPT-5.6 line (each with standard and Pro tiers) landed on the API with a 1M-token context window.
Jul 8, 2026 · xAI

Grok 4.5
Frontier LLM
xAI's Grok 4 successor, shipping with a 500k-token context window.
Jun 30, 2026 · Anthropic

Claude Sonnet 5
LLM
The Claude 5 generation's fast general-purpose workhorse, succeeding Sonnet 4.5 with a 1M-token context window.
Jun 30, 2026 · Google DeepMind

Gemini 3.1 Flash line (Nano Banana 2)
Multimodal
Fast Gemini 3.1 tier including the Nano Banana 2 image-generation models.
Jun 16, 2026 · Zhipu AI

GLM-5.2
Open weights
Open-weights flagship that topped Hugging Face trending and runs on surprisingly modest hardware.
2026 · Anthropic

Claude Fable 5 & Mythos 5
Frontier LLM
First models of the Claude 5 family: a new Mythos-class tier above Opus, with Fable 5 generally available and Mythos 5 limited to approved organizations.
2026 · Anthropic

Claude Opus 4.8
LLM
Capstone upgrade of the Claude 4 line, adding a fast mode for quicker output at full Opus quality.

December 2025

Dec 2, 2025 · Mistral AI

Mistral 3
Open weights
Mistral's open-weights frontier family — Mistral Large 3 plus compact dense models — released under Apache 2.0.

November 2025

Nov 25, 2025 · Black Forest Labs

FLUX.2
Image gen
Production-grade image generation and editing with multi-reference support and up-to-4MP output.
Nov 24, 2025 · Anthropic

Claude Opus 4.5
LLM
Reclaimed the top of the coding benchmarks at roughly a third of Opus 4.1's API price.
Nov 18, 2025 · Google DeepMind

Gemini 3 Pro
Frontier LLM
Google's strongest reasoning model at launch, with Deep Think mode and generative UI in the Gemini app.
Nov 12, 2025 · OpenAI

GPT-5.1
LLM
GPT-5 refresh with Instant and Thinking variants and adaptive reasoning depth per query.

October 2025

Oct 15, 2025 · Anthropic

Claude Haiku 4.5
Small LLM
Small-model tier matching Sonnet 4's coding ability at about a third of the cost and twice the speed.
Oct 15, 2025 · Google DeepMind

Veo 3.1
Video gen
Video model update with richer audio, reference-image control, and scene extension in Flow.

September 2025

Sep 30, 2025 · OpenAI

Sora 2
Video gen
Video generation with synchronized audio, launched alongside the invite-only Sora social app.
Sep 29, 2025 · Anthropic

Claude Sonnet 4.5
LLM
The mid-tier model leapfrogged Opus 4.1 on SWE-bench and sustained 30-hour autonomous agent runs.
Sep 29, 2025 · DeepSeek

DeepSeek-V3.2-Exp
Open weights
Introduced DeepSeek Sparse Attention and cut API prices roughly in half.

August 2025

Aug 7, 2025 · OpenAI

GPT-5
Frontier LLM
OpenAI's flagship: a router blending fast and reasoning models, rolled out to every ChatGPT tier including free.
Aug 5, 2025 · OpenAI

gpt-oss
Open weights
OpenAI's first open-weights release since GPT-2: 120B and 20B reasoning models under Apache 2.0.
Aug 5, 2025 · Anthropic

Claude Opus 4.1
LLM
Incremental Opus upgrade focused on agentic coding, reaching 74.5% on SWE-bench Verified.

July 2025

Jul 9, 2025 · xAI

Grok 4
Frontier LLM
Frontier model trained on the Colossus cluster, topping Humanity's Last Exam at launch.

June 2025

Jun 10, 2025 · Mistral AI

Magistral
Reasoning
Europe's first reasoning models — open-weights Small and enterprise Medium — with transparent chain-of-thought.

May 2025

May 29, 2025 · Black Forest Labs

FLUX.1 Kontext
Image gen
In-context image editing family: modify images with text prompts while preserving characters and style.
May 22, 2025 · Anthropic

Claude Opus 4 & Sonnet 4
Frontier LLM
The Claude 4 generation debut, built for long-horizon agent work and topping SWE-bench at release.
May 20, 2025 · Google DeepMind

Veo 3
Video gen
First mainstream video generator with native synchronized audio — dialogue, sound effects, and music.

April 2025

Apr 29, 2025 · Alibaba

Qwen3
Open weights
Hybrid thinking/non-thinking family from 0.6B dense to 235B MoE, released under Apache 2.0.
Apr 16, 2025 · OpenAI

o3 & o4-mini
Reasoning
Reasoning models that use every ChatGPT tool — browsing, Python, vision — inside the chain of thought.
Apr 5, 2025 · Meta

Llama 4 Scout & Maverick
Open weights
Meta's first mixture-of-experts Llamas, natively multimodal with a 10M-token context window on Scout.

March 2025

Mar 25, 2025 · Google DeepMind

Gemini 2.5 Pro
Frontier LLM
Thinking-by-default model that took the top LMArena spot with a 1M-token context window.

February 2025

Feb 27, 2025 · OpenAI

GPT-4.5
LLM
OpenAI's largest non-reasoning model ("Orion") — broader world knowledge and fewer hallucinations.
Feb 24, 2025 · Anthropic

Claude 3.7 Sonnet
LLM
First hybrid-reasoning Claude with visible extended thinking, launched alongside Claude Code.
Feb 17, 2025 · xAI

Grok 3
LLM
Trained on a 200k-GPU cluster, shipping Think mode and DeepSearch.

January 2025

Jan 20, 2025 · DeepSeek

DeepSeek-R1
Reasoning · Open weights
Open-weights reasoning model matching OpenAI o1 at a fraction of the price — the release that triggered a $600B Nvidia sell-off.

FAQ

What is the newest AI model?

The live tracker at the top of this page updates automatically from provider APIs. As of July 2026, the newest frontier launches are OpenAI's GPT-5.6 line (Sol, Luna, Terra), xAI's Grok 4.5, and Anthropic's Claude 5 family — Claude Fable 5 and Sonnet 5, with Mythos 5 limited to approved organizations.

What are the latest GPT and Claude models?

OpenAI's latest flagship line is GPT-5.x: GPT-5 (August 2025) and GPT-5.1 (November 2025), plus the o-series reasoning models. Anthropic's latest is the Claude 5 family — Fable 5, Mythos 5, and Sonnet 5 — which succeeded the Claude 4 line (Opus 4/4.1/4.5/4.8, Sonnet 4/4.5, Haiku 4.5).

How often do new AI models release?

Major labs ship a new flagship roughly every 6–12 months, with point upgrades every few weeks to months. In practice a significant model now lands almost every month: 2025 alone saw 25+ notable releases across OpenAI, Anthropic, Google, Meta, DeepSeek, Alibaba, Mistral, and xAI.

What is a frontier model?

A frontier model is one at or near the state of the art, pushing the boundary of capability in reasoning, coding, or multimodality. Current examples include Claude Fable 5, GPT-5.1, and Gemini 3 Pro. Frontier models are typically closed-weights; open-weights alternatives like DeepSeek, Qwen, and Llama usually follow within months.