Product dossier · by OpenAI
ChatGPT
Versions, pricing, availability and every story about ChatGPT.

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Ask Your LLM: Why Standardized Evaluation Matters for Model Comparison

The Ask Your LLM trend exposes the limits of manual AI model testing. Learn why standardized evaluation frameworks are essential for comparing ChatGPT, Claude, and Gemini in production. Explore the analysis.
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Deals & partnerships · OpenAI
Acquisition
OpenAI acquires Orchestra Bio
openai.com (source, opens in a new tab)Partnership
NVIDIA guarantees up to $105B for OpenAI’s Ohio data-center campus
Residual-value guarantee for OpenAI's 20-year lease of SB Energy's PORTS-Pike campus in Pike County, Ohio: 4.25 GW initially plus a 3.75 GW option, online from 2028. NVIDIA pays only on default; OpenAI must reimburse.
investor.nvidia.com (source, opens in a new tab)Acquisition
OpenAI to acquire Ona for secure cloud execution of Codex agents
openai.com (source, opens in a new tab)Partnership
Microsoft and OpenAI amend deal, ending exclusive licence
openai.com (source, opens in a new tab)Funding
OpenAI raises $122B at $852B valuation
Round closed with $122B in committed capital; anchored by Amazon, NVIDIA and SoftBank.
openai.com (source, opens in a new tab)Acquisition
OpenAI to acquire Astral (uv, Ruff) for Codex
openai.com (source, opens in a new tab)Acquisition
OpenAI to acquire Promptfoo (AI security testing)
openai.com (source, opens in a new tab)Partnership
NVIDIA commits $30B to OpenAI’s $110B funding round
NVIDIA and SoftBank each commit $30B and Amazon $50B to a $110B round at $730B pre-money; the round later closed at $122B ($852B post-money).
openai.com (source, opens in a new tab)Partnership
Amazon to invest $50B in OpenAI; AWS deal expands by $100B to 2 GW of Trainium
Amazon invests $50B ($15B upfront, $35B on conditions) as part of OpenAI's $122B round. AWS becomes exclusive third-party cloud for OpenAI Frontier; the $38B AWS deal grows by $100B over 8 years incl. ~2 GW of Trainium.
openai.com (source, opens in a new tab)Partnership
Disney invests $1B in OpenAI and licenses characters for Sora
thewaltdisneycompany.com (source, opens in a new tab)
Sources: company announcements & release notes.
Release timeline
Every ChatGPT model release · 19 releases
GPT-6.1 Sol
developers.openai.com (source, opens in a new tab)GPT-6 Sol & Luna
developers.openai.com (source, opens in a new tab)GPT-6 Astra
openai.com (source, opens in a new tab)GPT-5.6
developers.openai.com (source, opens in a new tab)GPT-5.5
openai.com (source, opens in a new tab)GPT-5.4
developers.openai.com (source, opens in a new tab)GPT-5.3-Codex
developers.openai.com (source, opens in a new tab)GPT-5.2
developers.openai.com (source, opens in a new tab)
Show all 19 releases
GPT-5.1
developers.openai.com (source, opens in a new tab)GPT-5
openai.com (source, opens in a new tab)o3 & o4-mini
openai.com (source, opens in a new tab)GPT-4.1
openai.com (source, opens in a new tab)GPT-4.5
openai.com (source, opens in a new tab)o3-mini
openai.com (source, opens in a new tab)o1-preview
openai.com (source, opens in a new tab)GPT-4o mini
openai.com (source, opens in a new tab)GPT-4o
openai.com (source, opens in a new tab)GPT-4 Turbo
openai.com (source, opens in a new tab)GPT-4
openai.com (source, opens in a new tab)
Sources: company announcements & release notes.
Latest on X
ChatGPT · @ChatGPT
We’re using dots to build better dots. @rennsong, an engineer at OpenAI, uses her dot to gather feedback from social media and user reports, update a live tracker in ChatGPT Space, and investigate and fix bugs with Codex.
Messi asked ChatGPT to teach him a chess opening that matched his style. It suggested Goat Horns 🤘
Keep sensitive conversations out of view with Locked Chats in ChatGPT. Move chats out of your regular history and search into a protected space you can unlock with a PIN on web and desktop, or a PIN, Face ID, Touch ID, or device unlock on supported mobile devices. New messages
ChatGPT Slides has new ways to get your deck ready—and get everyone on the same page. • Work together in real time in ChatGPT: Share decks, edit together, and leave comments. Ask ChatGPT or your dot to turn feedback into updates. • Edit right on the slide: Click to change
Editor's picks
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ChatGPT 5.5 Instant: 52.5% Hallucination Reduction
OpenAI launches ChatGPT 5.5 Instant, engineered for speed and a 52.5% reduction in hallucinations on high-stakes topics. Ideal…
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ChatGPT Goblin Mode: RLHF Persona Drift Explained
Explore OpenAI’s explanation of ChatGPT’s quirky ‘goblin mode’ as an unintended RLHF artifact. Learn the risks of persona…
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OpenAI GPT-5.5: Key Features and Enterprise Impact
OpenAI’s GPT-5.5 brings advanced multimodal reasoning, faster responses, and robust agentic tools to ChatGPT and API users. Explore…
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AI NFL Mock Drafts: Flaws and Better Analytics
Discover why AI-generated NFL mock drafts from ChatGPT and Gemini are more entertainment than reliable prediction. Uncover the…
More stories
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ChatGPT Mac App: Seamless AI Integration Guide
Explore OpenAI’s new native ChatGPT desktop app for macOS, powered by GPT-4o. Enjoy quick shortcuts, screen analysis, and low-latency voice chats for effortless productivity. Discover its…
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ChatGPT’s Interactive STEM Visuals: Transform Education
OpenAI enhances ChatGPT with dynamic, interactive visuals for STEM concepts, revolutionizing learning in physics and calculus. Explore impacts on students, educators, and EdTech competitors. Discover how…
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OpenAI GPT-5.3 Instant: Faster, Smoother AI Chats
OpenAI’s new GPT-5.3 Instant model prioritizes low latency and natural conversations, ideal for developers and businesses. Explore its impact on AI apps, competition, and everyday use…
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GPT-4o Persona Cloning: Users Preserve AI Personality
Discover how users are engineering personas to clone the agreeable GPT-4o model before its deprecation. Explore the rise of persona persistence in AI, its impacts on…
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ChatGPT vs Perplexity: Answer Engine or Creative Partner?
Discover the core differences between ChatGPT and Perplexity, from RAG-based answer engine to generative creative partner. Explore how these AI tools impact workflows, trust, and enterprise…
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AI Health Chatbots: Generalist LLMs vs Specialists
Explore the growing tension in AI health chatbots between fast, powerful generalist models like ChatGPT and compliant specialist platforms like Azure Health Bot. Weigh risks, benefits,…
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OpenAI gpt-image-1.5: Better Control for Image Generation
OpenAI’s gpt-image-1.5 update improves prompt adherence, element preservation, and editing in ChatGPT and API. Developers and creatives gain reliable workflows for production-ready images. Explore the strategic…
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OpenAI ChatGPT Images: Faster AI Generation with GPT-4o
OpenAI’s ChatGPT Images upgrade, powered by GPT-4o, delivers 4x faster image generation, precise mask-based editing, and improved text rendering. Explore how it integrates into workflows via…
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GPT-5.1: Refining the Qualitative Experience in AI Conversations
Discover OpenAI’s GPT-5.1, focusing on warmer interactions, style presets, and reliable custom instructions for consistent AI experiences. Learn about rollout, comparisons, and implications for users and…
Versions & specs
Model · date · context · max output · price per 1M tokens (in/out, cached) · modalities · cutoff · license
| Model | Released | Context | Max output | Price in / out (per 1M) | Modalities | Knowledge cutoff | License / access | Spec source |
|---|---|---|---|---|---|---|---|---|
| GPT-6.1 Sol | Sep 29, 2026 | 1.05M | 128K | $2 / $10 cached $0.1 Prompts >272K input: 2× input, 1.5× output. Batch/Flex −50%. | Text, image in → text out | Apr 2026 | Proprietary (API & app) | developers.openai.com |
| GPT-6 Sol & Luna GPT-6 Sol, GPT-6 Luna | Sep 22, 2026 | 1.05M | 128K | $2 / $10 Luna: $0.10 in / $0.50 out, cached $0.01. | Text, image in → text out | Apr 2026 (Sol) / May 2026 (Luna) | Proprietary (API & app) | developers.openai.com |
| GPT-6 Astra | Sep 3, 2026 | 1.05M | 128K | $10 / $50 cached $1 Prompts >272K input: 2× input, 1.5× output. Batch/Flex −50%. | Text, image in → text out | Apr 2026 | Proprietary (API & app) | developers.openai.com |
| GPT-5.6 | Jul 9, 2026 | 1.05M | 128K | $4 / $20 cached $0.4 | Text, image in → text out | Feb 2026 | Proprietary (API & app) | developers.openai.com |
| GPT-5.5 | Apr 23, 2026 | 1M | 128K | $5 / $30 cached $0.5 Prompts >272K input tokens: 2× input, 1.5× output. | Text, image in → text out | Dec 2025 | Proprietary (API & app) | developers.openai.com |
| GPT-5.4 | Mar 5, 2026 | 1M | 128K | $2.5 / $15 cached $0.25 | Text, image in → text out | Aug 2025 | Proprietary (API & app) | developers.openai.com |
| GPT-5.3-Codex | Feb 24, 2026 | 400K | 128K | $1.75 / $14 cached $0.18 | Text, image in → text out | Aug 2025 | Proprietary (API & app) | developers.openai.com |
| GPT-5.2 | Dec 11, 2025 | 400K | 128K | $1.75 / $14 cached $0.18 | Text, image in → text out | Aug 2025 | Proprietary (API & app) | developers.openai.com |
| GPT-5.1 | Nov 13, 2025 | 400K | 128K | $1.25 / $10 cached $0.13 | Text, image in → text out | Sep 2024 | Proprietary (API & app) | developers.openai.com |
| GPT-5 GPT-5, GPT-5 mini, GPT-5 nano | Aug 7, 2025 | 400K | 128K | $1.25 / $10 cached $0.13 | Text, image in → text out | Sep 2024 | Proprietary (API & app) | developers.openai.com |
| o3 & o4-mini o3, o4-mini | Apr 16, 2025 | 200K | 100K | $2 / $8 cached $0.5 o3 launched at $10/$40; cut 80% in June 2025. o4-mini: $1.10/$4.40. | Text, image in → text out | Jun 2024 | Proprietary (API & app) | developers.openai.com |
| GPT-4.1 GPT-4.1, GPT-4.1 mini, GPT-4.1 nano | Apr 14, 2025 | 1M | 33K | $2 / $8 cached $0.5 | Text, image in → text out | Jun 2024 | Proprietary (API) | developers.openai.com |
Vendor benchmark claims
- GPT-5: SWE-bench Verified 74.9% (vendor claim) · AIME 2025 94.6% without tools (vendor claim)
- GPT-4.1: SWE-bench Verified 54.6% (vendor claim)
Benchmarks as published by the vendor at launch; not independently verified by i10x.
Sources: company announcements & release notes. Prices = standard API list price in USD per 1M tokens at time of release or current docs; batch is typically 50% off.
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