OpenAI · Text line

GPT

12 stages over 52 months, from openai-gpt in Mar 2022 to GPT-5.6 in Jul 2026.

Evolution chamber01 / 12

OpenAI

openai-gpt

SIZE120M

Text

Downloads110K/mo

Likes320

Language model from OpenAI, 120M parameters.

Open weightsMIT099/1040

Ready to evolve

Every generation. A new possibility.

openai-gpt · Mar 2022

View model

12 stages, from openai-gpt (Mar 2022) to GPT-5.6 (Jul 2026). Press Evolve to watch each step.

How it grew

Context window

—v1
—v2
16Kv3.5
8Kv4
128Kv4o
1.05Mv4.1
400Kv5
400Kv5.1
400Kv5.2
1.05Mv5.4
1.05Mv5.5
1.05Mv5.6

Max output

—v1
—v2
4Kv3.5
8Kv4
16Kv4o
33Kv4.1
128Kv5
128Kv5.1
128Kv5.2
128Kv5.4
128Kv5.5
128Kv5.6

Output priceper 1M tokens, lower is better

—v1
—v2
$1.50v3.5
$60.00v4
$10.00v4o
$8.00v4.1
$10.00v5
$10.00v5.1
$14.00v5.2
$15.00v5.4
$30.00v5.5
$20.00v5.6

Parameters

120Mv1
137Mv2
—v3.5
—v4
—v4o
—v4.1
—v5
—v5.1
—v5.2
—v5.4
—v5.5
—v5.6

Downloadslast 30 days

110Kv1
17Mv2
—v3.5
—v4
—v4o
—v4.1
—v5
—v5.1
—v5.2
—v5.4
—v5.5
—v5.6

Every stage

v1 Stage 1
OpenAI
openai-gpt
SIZE120M
Text
TextDownloads110K/mo
TextLikes320
Language model from OpenAI, 120M parameters.
Open weightsMIT099/1040
v2 Stage 2
OpenAI
gpt2
SIZE137M
Text
TextDownloads17M/mo
TextLikes4.3K
Language model from OpenAI, 137M parameters.
Open weightsMIT058/1040
v3.5 Stage 3
OpenAI
GPT-3.5-turbo
CTX16K
Retired
26Quality
Text
TextInput$0.50/M
TextOutput$1.50/M
Compact GPT model for low-latency assistance and high-volume workloads
PaidProprietary201/1040
v4 Stage 4
OpenAI
GPT-4
CTX8K
Retired
34Quality
Tools
TextInput$30/M
TextOutput$60/M
GPT model for general reasoning, writing, coding, and tool-assisted tasks
PaidProprietary252/1040
+1 more in v4
- GPT-4 Turbo
v4o Stage 5
OpenAI
GPT-4o
CTX128K
Vision · Tools
TextImagePDFInput$2.50/M
TextOutput$10/M
Omni-era GPT for multimodal chat, practical coding, and general assistants
PaidProprietary316/1040
+3 more in v4o
v4.1 Stage 6
OpenAI
GPT-4.1
CTX1.05M
51Quality
Vision · Tools
TextImagePDFInput$2/M
TextOutput$8/M
Long-lived GPT workhorse for coding, instruction following, and production apps
PaidProprietary541/1040
v5 Stage 7
OpenAI
GPT-5
CTX400K
80Quality
Reasoning · Vision · Tools
TextImageInput$1.25/M
TextOutput$10/M
Original GPT-5 workhorse for reasoning, coding, writing, and tool workflows
PaidProprietary633/1040
v5.1 Stage 8
OpenAI
GPT-5.1
CTX400K
79Quality
Reasoning · Vision · Tools
TextImageInput$1.25/M
TextOutput$10/M
Sharper GPT-5 generation for coding, product work, and tool-assisted tasks
PaidProprietary700/1040
v5.2 Stage 9
OpenAI
GPT-5.2
CTX400K
84Quality
Reasoning · Vision · Tools
TextImageInput$1.75/M
TextOutput$14/M
Reliable GPT generation for broad coding, writing, and tool-assisted product work
PaidProprietary724/1040
v5.4 Stage 10
OpenAI
GPT-5.4
CTX1.05M
92Quality
Reasoning · Vision · Tools
TextImagePDFInput$2.50/M
TextOutput$15/M
Agent-ready GPT for coding and computer-use workflows at a lower cost
PaidProprietary819/1040
v5.5 Stage 11
OpenAI
GPT-5.5
CTX1.05M
95Quality
Reasoning · Vision · Tools
TextImagePDFInput$5/M
TextOutput$30/M
Default frontier GPT for coding, computer use, research, and knowledge work
PaidProprietary890/1040
v5.6 Stage 12
OpenAI
GPT-5.6
CTX1.05M
Reasoning · Vision · Tools
TextImagePDFInput$4/M
TextOutput$20/M
Frontier GPT-5.6 model for complex professional work, coding, and agentic workflows
PaidProprietary943/1040

GPT

openai-gpt

How it grew

Every stage

openai-gpt

gpt2

GPT-3.5-turbo

GPT-4

GPT-4o

GPT-4.1

GPT-5

GPT-5.1

GPT-5.2

GPT-5.4

GPT-5.5

GPT-5.6

More OpenAI lines