Writing

ChatGPT

OpenAI · #3 most active of 27 in Writing

Compare →

The most widely used consumer AI assistant, spanning writing, analysis, images and voice.

100

Trust score · Verified

2 data points checked · 2026-09-12

Model stack: VerifiedEntry price: UnverifiableUsage claim: UnverifiableVersion: VerifiedHow this works →

Current version

GPT-6 Astra

Entry cost

Pricing not published in the provided documentation

Changes / 30d

12

The short answers · verified September 16, 2026

What is the latest version of ChatGPT?
The current shipped version of ChatGPT is GPT-6 Astra, as of September 16, 2026.
How much does ChatGPT cost?
ChatGPT has no published flat entry price. Pricing not published in the provided documentation
What AI model does ChatGPT use?
ChatGPT runs primarily on GPT Image.

Source: OpenAIhelp.openai.com · Reusable under CC BY 4.0 — cite Tomorrow

Capabilities

  • Voice mode
  • Deep research
  • Canvas
  • Agent mode
  • Projects
  • Connectors
  • Realtime API
  • Voice agents
  • Computer use
  • Code interpreter
  • Image generation
  • Video generation
  • Web search
  • File search
  • Prompt caching
  • Fine-tuning
  • Plugins
  • Workspace Agents
  • Memories
  • Live translation
  • MCP Connectors
  • Text generation
  • Code generation
  • Realtime transcription
  • MCP and Connectors
  • Structured output
  • Embeddings
  • Images and vision
  • Audio and speech
  • Reasoning models
  • Vision fine-tuning
  • API
  • Voice & Audio
  • Agents
  • text generation
  • code generation
  • multimodal
  • agents
  • voice & audio
  • image generation
  • fine-tuning
  • Multimodal
  • File inputs
  • Image inputs
  • Speech generation
  • Agent Builder
  • MCP Server
  • text-generation
  • code-interpreter
  • voice-agents
  • voice agents
  • code interpreter
  • prompt caching
  • audio
  • mcp server
  • plugins
  • Agent builder
  • API access
  • Realtime audio
  • MCP Server support
  • agent builder
  • image-generation
  • mcp-servers
  • web-search
  • Voice
  • MCP connections
  • reasoning
  • images and vision
  • video generation
  • audio and speech
  • realtime api
  • Reasoning
  • Responses API
  • WebSocket mode
  • Multi-agent

Pricing

  • Free Tier

    Free tier available for ChatGPT usage

    Free

Entry price over time

9 of 48 points reconstructed from Internet Archive captures (hollow dots) — dated by capture, not by when we first saw the page. View a capture

1/10/2024 · $209/16/2026 · $0

Geek mode

Models under the hood

  • GPT Image

    OpenAI

    disclosed
  • GPT-5.2

    OpenAI

    disclosed
  • GPT-5.2 Thinking

    OpenAI

    disclosed
  • GPT-5.4

    OpenAI

    disclosed
  • gpt-5.6

    OpenAI

    disclosed
  • gpt-6-astra

    OpenAI

    disclosed

Context window

196K tokens on Plus

Public API

yes

Multi-model routing

yes

Stack signals

  • Model router
  • MCP connectors

Shared model stack

Other tracked products running on the same foundation models — a quick read on how much of the catalog moves when one of these models changes.

green disclosed · amber inferred · grey unattributed. Aliases are folded into one model; provider concentration counts only models with an established vendor.

Reported scale

Reference data. Each figure is whatever the source actually said — weekly users, downloads, revenue run-rate — with its own definition and date. These are not comparable between tools and are never used to rank anything.

  • Weekly active users

    ~1B

    weekly users

    Reported as approaching 1B weekly actives; not a direct OpenAI disclosure.

    as of Jul 2026·The Information ·inferred

  • Weekly active users

    800M

    weekly users

    Vendor stated

    Weekly actives, not paying seats.

    as of Oct 2025·OpenAI DevDay keynote ·disclosed

  • Business seats

    1M+

    paid seats

    Vendor stated

    as of Aug 2025·OpenAI business blog ·disclosed

Also in Writing

All Writing
ERNIE Bot

BaiduChina

25

Baidu's flagship assistant, now on open-weight ERNIE models.

Version
5.0-thinking-preview
Cost
Pay-as-you-go API pricing based on tokens. Token Plan Personal Edition and some free trials available.
Model
DeepSeek-V3.1
Hunyuan

TencentChina

16

Tencent's multimodal model family and assistant.

Version
Hunyuan-role-latest
Cost
Free trial up to 1 million tokens. Pay-as-you-go pricing applies afterward.
Model
Hunyuan-a13b
Kimi

Moonshot AIChina

10

Long-context assistant and agentic K-series models.

Version
Kimi K3
Cost
API access with pay-as-you-go pricing based on token consumption. File APIs are currently free.
Model
Kimi K2.6
Notion AI

Notion

10

AI inside your workspace

Version
3.7
Cost
Free tier · from $10/mo
Model
Claude Sonnet 4.5
Qwen Chat

AlibabaChina

10

Alibaba's assistant on the widely forked Qwen model family.

Version
Qwen3-2507
Cost
Free to chat on official website
Model
Qwen3
DeepSeek

DeepSeekChina

9

Open-weight reasoning models at a fraction of frontier pricing.

Version
DeepSeek-V4.1-Flash
Cost
Pay-as-you-go API pricing based on token consumption. No flat monthly fee.
Model
DeepSeek-R1

Elsewhere on the same models

Products in other segments that name one of ChatGPT's models in their stack.

Breeze

HubSpot

3

AI across the CRM

Version
Breeze Assistant
Cost
Free tier · from $20/mo
Model
GPT-5.2

Browser-using assistant

Version
gpt-6-astra
Cost
from $20/mo
Model
GPT-5.2

Multi-step research reports

Version
gpt-6-astra
Cost
from $20/mo
Model
GPT-5.2 Thinking
Consensus

Consensus

Evidence-based answers from science

Version
2025 platform
Cost
Free tier · from $9/mo
Model
GPT-5.2

Change history

  • version

    ChatGPT moved to GPT-6 Astra

    gpt-6-astraGPT-6 Astra

    source
  • capability

    New capabilities: Responses API, WebSocket mode, Multi-agent

    72 tracked75 tracked · +Responses API, WebSocket mode, Multi-agent

    source
  • version

    ChatGPT moved to gpt-6-astra

    GPT-6 Astragpt-6-astra

    source
  • capability

    New capabilities: Reasoning

    71 tracked72 tracked · +Reasoning

    source
  • capability

    New capabilities: reasoning, images and vision, video generation

    66 tracked71 tracked · +reasoning, images and vision, video generation, audio and speech, realtime api

    source
  • capability

    New capabilities: MCP connections

    65 tracked66 tracked · +MCP connections

    source
  • capability

    New capabilities: Voice

    64 tracked65 tracked · +Voice

    source
  • version

    ChatGPT moved to GPT-6 Astra

    gpt-6-astraGPT-6 Astra

    source
  • version

    ChatGPT moved to gpt-6-astra

    GPT-6 Astragpt-6-astra

    source
  • version

    ChatGPT moved to GPT-6 Astra

    gpt-6-astraGPT-6 Astra

    source
  • version

    ChatGPT moved to gpt-6-astra

    GPT-6 Astragpt-6-astra

    source
  • capability

    New capabilities: image-generation, mcp-servers, web-search

    61 tracked64 tracked · +image-generation, mcp-servers, web-search

    source
  • version

    ChatGPT moved to GPT-6 Astra

    gpt-6-astraGPT-6 Astra

    source
  • version

    ChatGPT moved to gpt-6-astra

    GPT-5.6gpt-6-astra

    source
  • model

    ChatGPT added gpt-6-astra to its model stack

    GPT Image, GPT-5.2, GPT-5.2 Thinking, GPT-5.4, gpt-5.6GPT Image, GPT-5.2, GPT-5.2 Thinking, GPT-5.4, gpt-5.6, gpt-6-astra

    source
  • capability

    New capabilities: agent builder

    60 tracked61 tracked · +agent builder

    source
  • capability

    New capabilities: API access, Realtime audio, MCP Server support

    57 tracked60 tracked · +API access, Realtime audio, MCP Server support

    source
  • version

    ChatGPT moved to GPT-5.6

    gpt-5.6GPT-5.6

    source
  • version

    ChatGPT moved to gpt-5.6

    GPT-5.6gpt-5.6

    source
  • capability

    New capabilities: Agent builder

    56 tracked57 tracked · +Agent builder

    source
  • version

    ChatGPT moved to GPT-5.6

    gpt-5.6GPT-5.6

    source
  • capability

    New capabilities: audio, mcp server, plugins

    53 tracked56 tracked · +audio, mcp server, plugins

    source
  • capability

    New capabilities: voice agents, code interpreter, prompt caching

    50 tracked53 tracked · +voice agents, code interpreter, prompt caching

    source
  • version

    ChatGPT moved to gpt-5.6

    GPT-5.6gpt-5.6

    source
  • version

    ChatGPT moved to GPT-5.6

    Using GPT-5.6GPT-5.6

    source
  • capability

    New capabilities: text-generation, code-interpreter, voice-agents

    47 tracked50 tracked · +text-generation, code-interpreter, voice-agents

    source
  • version

    ChatGPT moved to Using GPT-5.6

    GPT-5.6Using GPT-5.6

    source
  • version

    ChatGPT moved to GPT-5.6

    gpt-5.6GPT-5.6

    source
  • version

    ChatGPT moved to gpt-5.6

    GPT-5.6gpt-5.6

    source
  • version

    ChatGPT moved to GPT-5.6

    gpt-5.6GPT-5.6

    source
  • version

    ChatGPT moved to gpt-5.6

    GPT-5.6gpt-5.6

    source
  • capability

    New capabilities: MCP Server

    46 tracked47 tracked · +MCP Server

    source
  • capability

    New capabilities: Speech generation, Agent Builder

    44 tracked46 tracked · +Speech generation, Agent Builder

    source
  • version

    ChatGPT moved to GPT-5.6

    gpt-5.6GPT-5.6

    source
  • capability

    New capabilities: Image inputs

    43 tracked44 tracked · +Image inputs

    source
  • capability

    New capabilities: Multimodal, File inputs

    41 tracked43 tracked · +Multimodal, File inputs

    source
  • pricing

    Entry price decreased to $0/mo

    $8$0

    source
  • capability

    New capabilities: text generation, code generation, multimodal

    34 tracked41 tracked · +text generation, code generation, multimodal, agents, voice & audio, image generation, fine-tuning

    source
  • capability

    New capabilities: API, Voice & Audio, Agents

    31 tracked34 tracked · +API, Voice & Audio, Agents

    source
  • version

    ChatGPT moved to gpt-5.6

    GPT-5.6gpt-5.6

    source
Subscribe to ChatGPT changes

ChatGPT compared

Straight head-to-head pages against the busiest products in Writing.

How to cite this page

Free to cite and reuse under CC BY 4.0. Permalink: https://tomorrow.aliensquad.ai/tools/chatgpt

APA
Tomorrow. (2026). ChatGPT — version, pricing and model stack [Data set entry]. AlienSquad. Retrieved 2026-09-17, from https://tomorrow.aliensquad.ai/tools/chatgpt
BibTeX
@misc{tomorrow-tools-chatgpt,
  author       = {{Tomorrow}},
  title        = {ChatGPT — version, pricing and model stack},
  year         = {2026},
  publisher    = {AlienSquad},
  howpublished = {\url{https://tomorrow.aliensquad.ai/tools/chatgpt}},
  note         = {Accessed: 2026-09-17}
}