GPT 5.5
Reasoning with thinking
Use it for broad reasoning, product writing, planning, and polished answers when thinking mode matters.
Introducing teng.dev
All Top AI Models. One Chat.
Ask once, compare three leading models, generate images, and keep the prompts and outputs that move work forward.
Chat comparison
One prompt, three lanes
GPT 5.5Ready
Ready for the first prompt.
Claude Opus 4.8Ready
Ready for the first prompt.
Gemini 3.5 FlashReady
Ready for the first prompt.
Ask all enabled models...
Pick the best of each AI model
No single AI model is best at every task. teng.dev turns comparison into the default workflow, so writing, reasoning, coding, research, and image generation can each use the model that performs best.
Claude Opus 4.8
Deep writing analysis
Compare long-form drafts, strategy, editing, and explanation quality when tone and judgment matter.
Gemini 3.5 Flash
Fast multimodal review
Use it for quick contrast, multimodal prompts, and fast second opinions inside the same chat.
Claude Sonnet 4.6
Balanced daily work
Keep a faster Claude option available for drafts, analysis, coding, and everyday comparison.
Gemini 3.1 Pro
Long context option
Bring larger context into the workflow and test documents, mixed inputs, and complex instructions.
GPT Image 2
High quality image generation
Generate visuals from prompts and references with quality and resolution options.
Nano Banana
Fast visual iteration
Move through prompt directions, compare compositions, and save image results worth refining.
Get 5+ premium AI models for less than the price of one stack
Separate AI subscriptions get expensive, and they still leave you copying prompts between tools. teng.dev is built around the real decision: which model gave the most useful answer for this task?
Save 80%+ on AI subscriptions
Instead of maintaining separate subscriptions for every premium model, use one workspace built for comparison and daily creative work.
One window, multiple perspectives
Ask once, review the differences, and choose the result that moves work forward.
Never miss the best answer
Different models shine on different tasks. teng.dev makes comparison a default habit instead of extra work.
A directory tuned for model decisions
Jump straight into the task: chat, generate images, browse prompts, inspect history, or check pricing.
AI Chat
Compare model answers in one focused conversation space.
Image Generator
Create visuals with GPT Image 2 and Nano Banana workflows.
Prompt Gallery
Browse reusable image prompts and creative directions.
Model Comparison
See model strengths, pricing, and image generation costs.
History
Return to previous prompts, outputs, and saved assets.
Pricing
Start with one subscription, then add image credits as needed.
Compare, generate, save, and return to what worked
The core workflow is simple: keep the prompt stable, run the comparison, notice the differences, then save the strongest output or use it as the next iteration.
Multi-model parallel chat
Use one prompt as the shared starting point and compare how different AI systems respond.
Real-time side-by-side review
Judge quality by contrast: accuracy, tone, structure, creativity, and usefulness.
Choose your models
Match the model to the job instead of forcing every task through one assistant.
Conversation history
Keep prompts and outputs that worked so the next round starts from evidence.
Latest model upgrades
New model options can fit into the same comparison habit as the product evolves.
Secure private workspace
Accounts, generated files, history, and billing live inside one product surface.
Image generation
Move from text to visual output with image models, references, and saved history.
Prompt gallery
Start from prompt patterns, filter by model family, and adapt what works.
A practical AI workspace for people who judge by output
teng.dev exists because model choice is now part of real work. The best answer for a memo, code review, product concept, search-heavy question, or image prompt may come from different systems. A single chat window makes that easier to test.
The product is for builders, creators, operators, and researchers who want a clearer view of model behavior. Write one prompt, compare responses, inspect the tradeoffs, and keep the most useful version.
Image generation follows the same idea. Browse prompt patterns, compare style and composition, then save the outputs worth revisiting. Chat, images, prompts, history, and pricing belong in one product because the decision is the same: which output should I trust enough to use?
Frequently asked questions
The short version: teng.dev is a comparison-first AI workspace. Subscription covers the main model workspace, while image generation credits handle model-specific image costs.
How is teng.dev different from subscribing to each AI separately?
teng.dev puts leading AI models into one workspace so you can send the same prompt, compare answers, and keep the strongest result without switching tabs or paying for every standalone subscription.
Can I choose which AI models to use?
Yes. The workspace is built around model choice: pick the model that fits the task, compare outputs, and keep prompt history for future decisions.
How many messages do I get?
Pro is designed for daily model comparison work. Image generation uses credits because image models have different credit costs and resolution options.
Does teng.dev include image generation?
Yes. teng.dev includes GPT Image 2 and Nano Banana style workflows, plus a prompt gallery for proven creative directions.
Can I use teng.dev on my phone?
Yes. Chat uses a mobile model switcher, and image generation adapts the controls and preview for smaller screens.
Is my workspace private?
Your account, history, files, and billing state are handled inside teng.dev for private comparison, prompt reuse, and asset management.