GPT-6.1 Sol
Near-Astra capability for complex work with a lower-cost profile
AI MODEL FAMILY
OpenAI GPT Models & Versions - Complete List 2026
Current and previous OpenAI GPT model generations, from GPT-6.1 Sol and GPT-6 Astra to earlier GPT families.
14 tracked versionsDeveloper: OpenAIChecked: 2026-09-30
The OpenAI GPT family powers ChatGPT and API workflows across writing, coding, research, multimodal work and agents. This hub keeps major current and previous GPT generations connected so users can find the newest model without losing older high-intent version pages.
LATEST MODEL
GLatest
GPT-6.1 Sol
Near-Astra capability for complex work with a lower-cost profile
MODEL LINEAGE
Official source ->All OpenAI GPT versions
| Model | Release | Best for | Status |
|---|---|---|---|
| GPT-6.1 Solgpt-6.1-sol | Sep 29, 2026 | Near-Astra capability for complex work with a lower-cost profile | Latest |
| GPT-6 Astragpt-6-astra | Sep 3, 2026 | The hardest end-to-end reasoning, coding and agentic workflows | Current |
| GPT-6 Lunagpt-6-luna | Not specified | High-volume and cost-sensitive GPT-6 workloads | Current |
| GPT-4.1gpt-4.1 | Not specified | Legacy GPT-4 family application compatibility and migration research | Previous |
| GPT-5 | Not specified | GPT-5 generation compatibility, comparisons and historical searches | Previous |
| GPT-5.1 | Not specified | Earlier GPT-5 family workflows and migration comparisons | Previous |
| GPT-5.2 | Not specified | Earlier GPT-5 family workflows and compatibility research | Previous |
| GPT-5.3 Codex | Not specified | Coding-focused agent and software engineering workflows | Previous |
| GPT-5.4 | Not specified | Previous-generation OpenAI general intelligence and coding workflows | Previous |
| GPT-5.5 | Not specified | Previous-generation OpenAI reasoning and general assistant workloads | Previous |
| GPT-5.6 Luna | Not specified | Lower-cost GPT-5.6 workloads at higher volume | Previous |
| GPT-5.6 Sol | Not specified | Strong general-purpose reasoning, coding and knowledge work | Previous |
| GPT-5.6 Terra | Not specified | Balanced GPT-5.6 performance for everyday application workloads | Previous |
| GPT-6 Solgpt-6-sol | Not specified | Balanced GPT-6 intelligence, latency and cost for general production workloads | Previous |
Latest OpenAI GPT models
Tracked releases in this part of the model lineage.
Current OpenAI GPT models
Tracked releases in this part of the model lineage.
Previous OpenAI GPT models
Tracked releases in this part of the model lineage.
GPT-4.1
Legacy GPT-4 family application compatibility and migration research
GPT-5
GPT-5 generation compatibility, comparisons and historical searches
GPT-5.1
Earlier GPT-5 family workflows and migration comparisons
GPT-5.2
Earlier GPT-5 family workflows and compatibility research
GPT-5.3 Codex
Coding-focused agent and software engineering workflows
GPT-5.4
Previous-generation OpenAI general intelligence and coding workflows
GPT-5.5
Previous-generation OpenAI reasoning and general assistant workloads
GPT-5.6 Luna
Lower-cost GPT-5.6 workloads at higher volume
GPT-5.6 Sol
Strong general-purpose reasoning, coding and knowledge work
GPT-5.6 Terra
Balanced GPT-5.6 performance for everyday application workloads
GPT-6 Sol
Balanced GPT-6 intelligence, latency and cost for general production workloads