Apertis AI

11/10/2026

Claude Fable 5.2 is now live on Apertis!

Claude Fable 5.2 is Anthropic’s most capable model for advanced technical work and open-ended problem solving, delivering significant improvements in coding, reasoning, and vision over Fable 5.1. It excels at exceptionally complex tasks, including large-scale software migrations, electronic system design, and advanced scientific and mathematical research.

Try it now on Apertis:
https://apertis.ai/models/claude-fable-5.2

Claude Fable 5.2 is Anthropic's most capable model for advanced technical work and open-ended problem solving, delivering significant improvements in coding, reasoning, and vision over Fable 5.1. It excels at exceptionally complex tasks, including large-scale software migrations, electronic system d...

10/27/2026

GPT-6.1 Terra is now live on Apertis!

GPT-6.1 Terra is OpenAI’s mid-tier model in the GPT-6.1 series, designed to balance capability, speed, and cost efficiency. Positioned below GPT-6.1 Sol, it delivers strong performance across everyday agentic workflows, coding, and professional writing, with particular strengths in screenshot understanding and on-screen content analysis.

Try it now on Apertis:
https://apertis.ai/models/gpt-6.1-terra

GPT-6.1 Terra is OpenAI’s mid-tier model in the GPT-6.1 series, designed to balance capability, speed, and cost efficiency. Positioned below GPT-6.1 Sol, it delivers strong performance across everyday agentic workflows, coding, and professional writing, with particular strengths in screenshot unde...

10/24/2026

Kimi K3.1 Pro is now live on Apertis!

Kimi K3.1 Pro is Moonshot AI's flagship open-weight multimodal reasoning model, building on Kimi K3 with enhanced post-training for advanced reasoning and autonomous task ex*****on. It features a 1M-token context window and native image and video understanding, enabling complex, long-context multimodal workflows.

Try it now on Apertis:
https://apertis.ai/models/kimi-k3.1-pro

Kimi K3.1 Pro is Moonshot AI's flagship open-weight multimodal reasoning model, building on Kimi K3 with enhanced post-training for advanced reasoning and autonomous task ex*****on. It features a 1M-token context window and native image and video understanding, enabling complex, long-context multimo...

10/17/2026

DeepSeek V4.1 Flash 1017 is now live on Apertis!

DeepSeek V4.1 Flash 1017 is the October 17, 2026 snapshot of DeepSeek’s cost-efficient Mixture-of-Experts (MoE) model, built on its innovative Causal Encoder-Decoder (CED) architecture. Featuring 552B total parameters with 8B activated for input and 16B for output, it combines efficient inference with native multimodal understanding through jointly trained text and visual representations.

Try it now on Apertis:
https://apertis.ai/models/deepseek-v4.1-flash-1017

DeepSeek V4.1 Flash 1017 is the October 17, 2026 snapshot of DeepSeek’s cost-efficient Mixture-of-Experts (MoE) model, built on its innovative Causal Encoder-Decoder (CED) architecture. Featuring 552B total parameters with 8B activated for input and 16B for output, it combines efficient inference ...

10/16/2026

Nemotron 3.5 Super VL is now live on Apertis!

NVIDIA Nemotron 3.5 Super VL is an open multimodal Mixture-of-Experts (MoE) model featuring 120B total parameters with 12B activated per token. Built on a hybrid Mamba–Transformer architecture with multi-token prediction, it supports text, images, documents, GUI screenshots, and video inputs, along with a 1M-token context window for complex, long-horizon workflows.

Try it now on Apertis:
https://apertis.ai/models/nemotron-3.5-super-vl

NVIDIA Nemotron 3.5 Super VL is an open multimodal Mixture-of-Experts (MoE) model featuring 120B total parameters with 12B activated per token. Built on a hybrid Mamba–Transformer architecture with multi-token prediction, it supports text, images, documents, GUI screenshots, and video inputs, alon...

10/16/2026

Muse Spark Open is now live on Apertis!

Muse Spark Open is an open-weight, coding-optimized model designed for agentic software engineering workflows. It delivers strong first-attempt accuracy, reliable tool calling, and deep codebase understanding, enabling effective development across real-world repositories.

Try it now on Apertis:
https://apertis.ai/models/muse-spark-open

Muse Spark Open is an open-weight, coding-optimized model designed for agentic software engineering workflows. It delivers strong first-attempt accuracy, reliable tool calling, and deep codebase understanding, enabling effective development across real-world repositories. Optimized for autonomous co...

10/14/2026

Gemini 4 Argon is now live on Apertis!

Gemini 4 Argon is Google's flagship reasoning model, built for complex software engineering, deep mathematical and scientific problem solving, and autonomous multi-step agents. Google trained it to keep context across long, multi-step tasks and to turn long documents mixing text, tables, charts and images into a single grounded output.

Try it now on Apertis:
https://apertis.ai/models/gemini-4-argon

Gemini 4 Argon is Google's flagship reasoning model, built for complex software engineering, deep mathematical and scientific problem solving, and autonomous multi-step agents. Google trained it to keep context across long, multi-step tasks and to turn long documents mixing text, tables, charts and....

10/07/2026

Apertis has joined the Claude Startups program.

We're building model supply and delivery infrastructure for teams bringing AI agents into production: organization-scoped keys, budgets, cost attribution and audit trails behind one OpenAI-compatible API.

The program gives our own team Claude to build with, and time with Anthropic's team. Both go straight into what we ship next.

Apertis joins the Claude Startups program. STIMA AI, the company behind Apertis, has joined the Claude Startups program. Apertis AI 2.2.108, Oct 7, 2026.

09/29/2026

Claude Sonnet 5.5 is now live on Apertis!

Claude Sonnet 5.5 is Anthropic's Sonnet-class model for well-scoped everyday work, serving as a direct upgrade to Sonnet 5. It excels at feature development, bug fixing, and creating polished documents, presentations, and spreadsheets, while offering clearer writing and communication than its predecessor.

Try it now on Apertis:
https://apertis.ai/models/claude-sonnet-5.5

Claude Sonnet 5.5 is Anthropic's Sonnet-class model for well-scoped everyday work, serving as a direct upgrade to Sonnet 5. It excels at feature development, bug fixing, and creating polished documents, presentations, and spreadsheets, while offering clearer writing and communication than its predec...

09/23/2026

GPT-6 Luna is now live on Apertis!

GPT-6 Luna is the fast, cost-efficient model in OpenAI's GPT-6 series, optimized for high-volume and latency-sensitive workloads such as chat, classification, and lightweight agentic tasks. It combines low-cost, responsive inference with the GPT-6 family’s improvements in factual reliability and clear, concise communication.

Try it now on Apertis:
https://apertis.ai/models/gpt-6-luna