Use OpenChat 3.5 (0106) for Free

OpenChat 3.5 (0106) is an AI model released January 2024 by openchat, a leading organization in large language model research. Community-trained OpenChat 3.5 — outperforms ChatGPT-3.5 on MT-Bench at just 7B params. Friendly, conversational tone. With 7B and a 8K tokens context window, OpenChat 3.5 (0106) is designed to excel across a range of demanding tasks — from software engineering and mathematical problem-solving to multilingual content generation and long-document analysis.

OpenChat 3.5 (0106) uses a dense transformer architecture with 7B of parameters, all of which are active for every input token. Dense architectures provide predictable, consistent behavior across diverse task types — there are no "cold" experts to warm up, and quality is uniform across prompts. openchat's training pipeline combined large-scale pretraining on a large-scale multilingual pretraining dataset with supervised fine-tuning and alignment techniques (RLHF or DPO), producing OpenChat 3.5 (0106)'s characteristic balance of capability, helpfulness, and safety.

As of 2026-10-16, OpenChat 3.5 (0106) by openchat demonstrates measurable performance on standard AI evaluation benchmarks. On MT-Bench — which measures model performance on specialized evaluation tasks — it achieves 7.8. For software engineering tasks, OpenChat 3.5 (0106) scores 71.4% on HumanEval, which tests ability to write correct functions from docstrings. These scores place OpenChat 3.5 (0106) — at 7B of parameters — in a competitive position within its model class. Note that benchmark scores reflect controlled evaluation conditions; real-world performance varies by task, prompt design, and domain specificity.

The primary strengths of OpenChat 3.5 (0106) are: 7.8 MT-Bench — first 7B to match ChatGPT-3.5 on MT-Bench at January 2024 release; C-RLFT training: outperforms standard RLHF without proprietary preference data; MIT license. These make it particularly well-suited for Legacy OpenChat 3.5 deployments, Research on efficient instruction tuning. Users working on complex, multi-step problems benefit most from OpenChat 3.5 (0106)'s ability to maintain coherence across long inputs and produce structured, verifiable outputs.

Like all current AI systems, OpenChat 3.5 (0106) has limitations: Superseded by Qwen3 8B, Llama 3.1 8B, Gemma 3; 8K context window. For production deployments, validating outputs against authoritative sources — especially for domain-specific or time-sensitive information — remains best practice. openchat continues to improve OpenChat 3.5 (0106) through ongoing research.

OpenChat 3.5 (0106) is available on LITHOVEX AI with a free account. Unlike direct API access — which requires billing setup, API key management, and per-token charges — LITHOVEX AI provides a seamless browser interface with no setup required, making OpenChat 3.5 (0106) accessible to students, researchers, developers, and early-stage teams globally.

As of 2026-10-16, OpenChat 3.5 (0106) by openchat demonstrates measurable performance on standard AI evaluation benchmarks. On MT-Bench — which measures model performance on specialized evaluation tasks — it achieves 7.8. For software engineering tasks, OpenChat 3.5 (0106) scores 71.4% on HumanEval, which tests ability to write correct functions from docstrings. These scores place OpenChat 3.5 (0106) — at 7B of parameters — in a competitive position within its model class. Note that benchmark scores reflect controlled evaluation conditions; real-world performance varies by task, prompt design, and domain specificity.

Dense transformer, 7B parameters, C-RLFT fine-tuned from Mistral 7B

The training pipeline for OpenChat 3.5 (0106) involves multiple stages: large-scale pretraining on diverse multilingual text and code corpora to develop broad world knowledge, followed by supervised fine-tuning on instruction-response pairs, and alignment techniques such as RLHF or DPO. Each stage refines the model's helpfulness, accuracy, and safety. openchat's research team — based in International — has optimized OpenChat 3.5 (0106) for the specific capability profile described above.

Inference efficiency: OpenChat 3.5 (0106) at 7B is designed to deliver quality outputs at practical serving speeds. Its 8K tokens context window enables processing entire documents, multi-file codebases, and extended conversation histories — particularly valuable for contract review, technical documentation analysis, and codebase-level AI assistance.

Getting started with OpenChat 3.5 (0106) on LITHOVEX AI takes under two minutes. Follow these steps:

For best results with OpenChat 3.5 (0106): provide specific, context-rich prompts; include examples when generating code; specify output format when structure matters; break complex tasks into focused sub-questions.

openchat is a leading organization in AI research and large language model development. Their team has built expertise across natural language processing, model architecture design, and alignment research. openchat's models are used by researchers, developers, and enterprises worldwide. Their commitment to advancing AI capability while maintaining responsible deployment practices has made them a respected contributor to the global AI ecosystem. The organization continues to publish research and release models that push the boundaries of what AI systems can achieve.

Founded: 2023, headquartered in International.

Visit the official openchat website →

OpenChat 3.5 (0106) by openchat competes in a field with several strong alternatives. Below is a detailed side-by-side comparison against commonly listed alternatives, using benchmark data and capability profiles in the catalog.

Both OpenChat 3.5 (0106) and the models above are available free on LITHOVEX AI — test them side by side on your real tasks before committing to a subscription with any provider.

OpenChat 3.5 (0106) is released under MIT, which means you can download and run it on your own hardware. Below are the quickest ways to get started.

OpenChat 3.5 gained global community adoption as a practical alternative to GPT-3.5 Turbo for developers and researchers who needed strong aligned performance without API costs. Particularly popular in the global open-source AI community for its exceptional quality-to-cost ratio.

OpenChat 3.5 (0106) by openchat has the following version history and notable updates:

For the complete changelog and latest release notes, visit the official openchat model page.