TextSynth Text Completion
TextSynth Text Completion is an AI tool focused on text completion using large language models, offering a playground for experimentation.
Last verified:
Visit TextSynth Text Completion
What is TextSynth Text Completion?
TextSynth Text Completion is a web playground for generating text with large language models. You type a prompt, and the model completes it with a different randomly chosen continuation each time. The playground is designed for quick experimentation with prompt ideas, creative writing, coding-style completion, and general language-model testing.
The interface exposes several completion controls so users can shape the output. On the playground page, you can choose from models such as Mistral 7B, Llama3.1 8B instruct, Gemma 3 27B instruct, and Llama3.3 70B instruct, then adjust top-k, top-p, temperature, maximum tokens, and a stop sequence. That makes it useful for comparing model behavior and tuning how predictable or creative the output is.
TextSynth is also a broader API platform, so the playground is only one part of a larger system that includes a REST API and other model types. The website says it supports text completion, question answering, classification, chat, translation, image generation, speech generation, and speech-to-text transcription. It is aimed at developers, tinkerers, and anyone who wants hands-on access to models without building their own inference stack.
The service emphasizes low-cost inference on standard GPUs and CPUs, with a free basic tier that is rate-limited and paid usage for fewer restrictions. Its pricing model is token-based for text, image-based for image generation, and usage-based for speech features. The site also notes that servers are located in France and that custom support is available by contact.
TextSynth Text Completion pricing
Pricing model: Freemium
TextSynth uses a free basic service that is rate-limited, and the pricing page says paid usage removes limitations through a credit-based system. The free plan gives access to the language models with request-rate limits and captcha checks, while the standard plan removes rate limits and does not keep request content logs on the servers. For text models, prices are based on input tokens plus generated tokens, with generated tokens costing more because they require more computation. The site says purchased credits are handled through Stripe, the minimum purchase is €20 / $20, and purchased credits last one year.
TextSynth Text Completion pros
- Simple prompt-and-complete workflow
- Different completion on every try
- Multiple model choices in the playground
- Top-k control for sampling breadth
- Top-p control for nucleus sampling
- Temperature control for creativity
- Maximum tokens control
- Custom stop sequence support
- Good for prompt experimentation
- Useful for creative writing tests
- Useful for coding completion experiments
- Supports larger instruct-tuned models
- Free basic access available
- REST API for programmatic use
- Broader platform beyond text completion
TextSynth Text Completion cons
- Free tier is rate-limited
- Captcha required on free usage
- Free tier caps generated tokens per request
- Model selection is limited to listed playground models
- Pricing details can be confusing across modalities
- Output is randomly sampled, not deterministic
- Heavy usage requires paid credits
- Text completion page is not a full chat interface
Frequently asked questions about TextSynth Text Completion
What does the TextSynth playground do?
It lets you enter a prompt and have a large language model complete it. Each run can produce a different continuation, which makes it useful for testing how models respond to the same starting text.
Which models are available in the playground?
The playground page lists Mistral 7B, Llama3.1 8B instruct, Gemma 3 27B instruct, and Llama3.3 70B instruct as selectable models.
Can I control how the model generates text?
Yes. The playground exposes top-k, top-p, temperature, max tokens, and stop-at controls so you can influence randomness, length, and where generation ends.
Is TextSynth free to use?
Yes, there is a basic free service, but it is rate-limited and uses captcha checks. The website also offers a paid standard plan for users who want fewer restrictions.
What does the paid plan change?
The standard plan removes rate limits, does not limit the number of generated tokens, and says no request content is kept on the servers. It is credit-based rather than an unexpected per-request billing model.
How is TextSynth priced?
Text pricing is based on the number of input tokens plus the number of generated tokens. The pricing page explains that tokens are the unit processed by the language model and that generated tokens cost more than input tokens.
Does TextSynth support anything besides text completion?
Yes. The site says the platform also supports question answering, classification, chat, translation, image generation, speech generation, and speech-to-text transcription through its API and related playgrounds.
Who is TextSynth meant for?
It is aimed at developers, prompt testers, and people who want direct access to language models for experimentation. It also fits users who want a lightweight playground before integrating the API into their own apps.
Where are TextSynth servers located?
The site states that all servers are located in France.
How do I get custom support or help with TextSynth?
The website says custom support is available by contacting the team at their published support email address on the main site.