Claude Sonnet 5 Is Now on Felo Playground — Compare It Free with 4 Models at Once
Anthropic just released Claude Sonnet 5. Try it free on Felo Playground alongside 4+ other top AI models and compare outputs side by side.
Anthropic just released Claude Sonnet 5 — the most agentic Sonnet model yet — and it's already available on Felo Playground. Better yet, you can try it for free and compare its outputs with other leading models side by side.
Try Claude Sonnet 5 on Felo Playground →
What Is Felo Playground?
Felo Playground is Felo's LLM Playground — a free platform where you can access and compare multiple leading AI models in one place. No API keys, no billing, no configuration.
Key Features
- Multiple models, one place: Access Claude Sonnet 5, Gemini 3.5 Pro, Gemini 3.5 Flash, GPT-5.6, and more — all from a single interface
- Compare up to 4 models at once: Open a multi-model chat and send the same prompt to 4 different AI models simultaneously. See their responses side by side to pick the best one for your task
- Free to try: No signup friction, no credit card required. Just pick a model and start chatting
- No setup needed: Skip API keys and SDK integration. The Playground is browser-based and ready to use instantly
Available Models
Felo Playground hosts a rotating selection of the latest frontier models, including:
| Model | Provider | Notable For |
|---|---|---|
| Claude 5.0 Sonnet | Anthropic | Agentic coding, reasoning, tool use — close to Opus 4.8 at Sonnet pricing |
| Claude Sonnet 4.6 | Anthropic | Previous-gen Sonnet, still excellent for most tasks |
| Gemini 3.5 Pro | Google DeepMind | Google's flagship model with strong reasoning and coding |
| Gemini 3.5 Flash | Google DeepMind | Google's fastest model — 4× faster than comparable frontier models |
| GPT-5.6 | OpenAI | OpenAI's latest with advanced reasoning and long-context capabilities |
The lineup evolves as new models release — Felo adds them as soon as they're available.
How to Try Claude Sonnet 5 on Felo Playground
As shown in the screenshot above, Claude 5.0 Sonnet is already listed in the Felo Playground model selector:
- Go to playground.felo.ai
- Click the model selector and choose Claude 5.0 Sonnet (or Claude Sonnet 4.6 for the previous generation)
- Type your prompt and start chatting
Want to compare it with other models? Use the multi-model feature to open up to 4 models side by side — send the same question and see which model gives you the best answer.
Why Claude Sonnet 5 Is Worth Trying
Claude Sonnet 5 is Anthropic's latest mid-tier model, built to be "the most agentic Sonnet model yet." Key highlights:
- Reasoning: Finishes complex multi-step tasks where previous Sonnet models would stop short
- Self-checking: Verifies its own output without being explicitly asked
- Coding: Strong on brownfield code — race conditions, hidden tests, the parts nobody wants to touch
- Safety: Lower rate of hallucination and sycophancy than Sonnet 4.6
Early access testers consistently described it as "much more agentic" than previous Sonnet models.
Pricing (for reference)
On the Claude Platform, Claude Sonnet 5 launches with introductory pricing of $2 / 1M input tokens and $10 / 1M output tokens through August 31, 2026.
On Felo Playground, you can try it for free right now.
Why This Matters
When a mid-tier model can match Opus-class results on certain tasks, it changes the economics of building with AI. Sonnet 5 sits at the Pareto frontier for many use cases — coding, research, automation, and knowledge work — offering near-Opus performance at Sonnet pricing.
And with Felo Playground, you don't need to sign up for API access or run benchmarks yourself. Just open the Playground, pick your models, and compare.
Try Claude Sonnet 5 on Felo Playground →
Claude Sonnet 5 information sourced from Anthropic's official announcement and the Claude Sonnet 5 System Card.
This post is also available in 简体中文, 日本語, 한국어, 繁體中文, हिन्दी, Français, العربية, Русский, اردو, Bahasa Indonesia, Deutsch, Tiếng Việt, Türkçe, Italiano, ไทย, Español, বাংলা and Português.