Models

GPT

OpenAI

OpenAI's models: 27% of enterprise LLM API spend in 2025, down from 50% in 2023 (Menlo Ventures).

• Models

Pricing

API billed per token, e.g. gpt-6.1-sol at $2/$10 and gpt-6.1-terra at $1/$5 per million input/output tokens (source: developers.openai.com/api/docs/pricing).

Updated on

October 27, 2026

Platforms

API

Context window

1,050,000 tokens (GPT-6.1 Sol); depends on the model

MCP support

Yes

Reference model

GPT-6.1 Sol

API price (per million tokens)

input $2 · output $10 (above 272K input tokens: 2x input, 1.5x output) · Source

Open weights

No

Release date

September 29, 2026

Alternatives

• Claude · Claude vs GPT
• Open-source models · GPT vs Open-source models
• Muse Spark Open · GPT vs Muse Spark Open
• MiniMax M3.1 Flash · GPT vs MiniMax M3.1 Flash

All GPT alternatives (6) →

Related articles and comparisons

• Model APIs: Anthropic overtook OpenAI in two years
• COBOL, Fortran: OpenAI pitches AI for legacy migration
• VS Code 1.143, GPT-6 on Google Cloud, NVIDIA DSX POD: the October 22 roundup
• Anthropic files to go public, OpenAI launches GPT-6.1 Terra: the October 27 roundup

Sources

• Menlo Ventures: 2025 State of Generative AI in the Enterprise
• OpenAI: API pricing
• OpenAI: GPT-6.1 Sol model page (context)
• Google Cloud: OpenAI models in Model Garden
• OpenAI: GPT-6.1 Terra model page

Official site →