DeepSeek V4 Pro and Flash (preview)
DeepSeek released open-weight V4 preview models with one-million-token context and thinking/non-thinking modes.
For buildersCompare the Pro and Flash variants on your own long-input tasks.
Updated
AI models released in April 2026
10 model releases from 7 providers in April 2026, with announcement dates, official sources, and practical notes for builders.
Releases this month
Dates refer to the linked announcement or release milestone. Previews are labeled in the entries; historical availability and pricing may have changed.
Release details
GPT-5.5
OpenAI released GPT-5.5 for coding, research, data analysis, and work across computer tools. API availability followed on April 24.
For buildersTurn a messy brief and spreadsheet into a small internal tool, then check the calculations and behavior against the original data.
GPT Image 2 (ChatGPT Images 2.0)
A new image model introduced stronger instruction following and generation of complex visual layouts.
For buildersTest diagrams and designs that require accurate text and consistent spatial relationships.
Kimi K2.6
Moonshot released an updated open model focused on coding and sustained agent workflows.
For buildersEvaluate changes spanning multiple files rather than judging only single code snippets.
Claude Opus 4.7
Anthropic introduced an Opus update with stronger coding, vision, and complex multi-step task performance.
For buildersFor visual app work, test whether the model follows both functional requirements and design references.
GPT-Rosalind (research preview)
A specialized reasoning model for biology and drug-discovery research launched through a restricted research preview.
For buildersSpecialized models require domain-specific evaluation and an appropriate access program.
Gemini 3.1 Flash TTS
A new text-to-speech model expanded control over expressive generated speech.
For buildersPrototype spoken instructions and compare clarity across different speaking styles.
Midjourney V8.1
V8.1 improved speed and introduced direct 2K image generation.
For buildersCompare native high-resolution outputs with upscaled images.
GLM-5.1
GLM-5.1 targeted sustained agentic engineering.
For buildersMeasure progress across long coding sessions.
Gemma 4
Gemma 4 introduced open models focused on reasoning and agent workflows across different hardware sizes.
For buildersTest an offline assistant on the device class your users actually own.