--- title: Deep Cogito: Cogito V2.1 671B | Text Generation | ModelsLab description: Top open-source 671B MoE LLM (37B active) with 128K context, 30+ languages, superior reasoning, coding & instruction-following at $1.25/M tokens.[1][4][5] url: https://modelslab.com/models/deepcogito/deepcogito-cogito-v2.1-671b.md canonical: https://modelslab.com/models/deepcogito/deepcogito-cogito-v2.1-671b.md type: product component: Playground/LLM/Index generated_at: 2026-06-03T20:22:42.450062Z --- Deep Cogito: Cogito v2.1 671B --- [LLMs.txt](https://modelslab.com/models/open_router/deepcogito-cogito-v2.1-671b/llms.txt) [.md](https://modelslab.com/models/deepcogito/deepcogito-cogito-v2.1-671b.md) Deep Cogito: Cogito v2.1 671B --- Choose a prompt below to get started or type your own message Explain quantum computing in simple terms Write a Python function to sort a list Create a marketing email for a SaaS product Compare REST vs GraphQL APIs Send ### Deep Cogito: Cogito v2.1 671B deepcogito deepcogito-cogito-v2.1-671b Copy model ID PricingInput $1.25 / 1M tokens Output $1.25 / 1M tokens API EndpointsOpenAI Compatible `https://modelslab.com/api/v7/llm/chat/completions`Endpoint Anthropic Compatible `https://modelslab.com/api/v7/llm/v1/messages`Messages `https://modelslab.com/api/v7/llm/v1/messages/count_tokens`Count Tokens `https://modelslab.com/api/v7/llm/v1/models`Models Use with Claude Code cURL Example ParametersSystem MessageYou are a helpful AI assistant specialized in providing accurate and detailed responses. Temperature0.7 Max Tokens1000 Top P0.9 Frequency Penalty0 Presence Penalty0 Model Info Support Related Models --- Discover similar models you might be interested in [View all LLM Models](https://modelslab.com/models?feature=llmaster) [#### google/Gemini 2.5 Flash gemini-2.5-flash From $1.40/M tokens](https://modelslab.com/models/google/gemini-2.5-flash) [#### open\_router/Google: Gemma 2 27B google-gemma-2-27b-it From $0.65/M tokens](https://modelslab.com/models/open_router/google-gemma-2-27b-it) [#### refuel\_ai/Refuel LLM V2 Small togethercomputer-Refuel-Llm-V2-Small From $0.24/M tokens](https://modelslab.com/models/refuel_ai/togethercomputer-Refuel-Llm-V2-Small) [#### open\_router/Tencent: Hunyuan A13B Instruct tencent-hunyuan-a13b-instruct From $0.35/M tokens](https://modelslab.com/models/open_router/tencent-hunyuan-a13b-instruct) [#### open\_router/NVIDIA: Nemotron 3 Super (free) nvidia-nemotron-3-super-120b-a12b-free Free](https://modelslab.com/models/open_router/nvidia-nemotron-3-super-120b-a12b-free) [#### open\_router/ByteDance Seed: Seed 1.6 Flash bytedance-seed-seed-1.6-flash From $0.19/M tokens](https://modelslab.com/models/open_router/bytedance-seed-seed-1.6-flash) [#### open\_router/OpenAI: GPT-4o (2024-11-20) openai-gpt-4o-2024-11-20 From $6.25/M tokens](https://modelslab.com/models/open_router/openai-gpt-4o-2024-11-20) [#### open\_router/Xiaomi: MiMo-V2.5 xiaomi-mimo-v2.5 From $0.21/M tokens](https://modelslab.com/models/open_router/xiaomi-mimo-v2.5) [#### google\_deepmind/Gemma 3N E4B Instruct google-gemma-3n-E4B-it From $0.09/M tokens](https://modelslab.com/models/google_deepmind/google-gemma-3n-E4B-it) [#### together\_ai/OpenAI GPT-OSS 120B openai-gpt-oss-120b From $0.11/M tokens](https://modelslab.com/models/together_ai/openai-gpt-oss-120b) [#### alibaba\_cloud/Qwen: Qwen3.5-27B qwen-qwen3.5-27b From $1.35/M tokens](https://modelslab.com/models/alibaba_cloud/qwen-qwen3.5-27b) [#### open\_router/Google: Gemma 3 27B google-gemma-3-27b-it From $0.12/M tokens](https://modelslab.com/models/open_router/google-gemma-3-27b-it) [#### meta/Meta Llama 3 70B Instruct Turbo meta-llama-Meta-Llama-3-70B-Instruct-Turbo From $0.88/M tokens](https://modelslab.com/models/meta/meta-llama-Meta-Llama-3-70B-Instruct-Turbo) [#### open\_router/Qwen: Qwen3 235B A22B Thinking 2507 qwen-qwen3-235b-a22b-thinking-2507 From $0.10/M tokens](https://modelslab.com/models/open_router/qwen-qwen3-235b-a22b-thinking-2507) [#### open\_router/Qwen: Qwen Plus 0728 (thinking) qwen-qwen-plus-2025-07-28-thinking From $0.52/M tokens](https://modelslab.com/models/open_router/qwen-qwen-plus-2025-07-28-thinking) [#### open\_router/Z.ai: GLM 5.1 z-ai-glm-5.1 From $2.03/M tokens](https://modelslab.com/models/open_router/z-ai-glm-5.1) [#### open\_router/Meta: Llama 3.2 1B Instruct meta-llama-llama-3.2-1b-instruct From $0.11/M tokens](https://modelslab.com/models/open_router/meta-llama-llama-3.2-1b-instruct) [#### open\_router/Mistral: Mistral Medium 3.5 mistralai-mistral-medium-3-5 From $4.50/M tokens](https://modelslab.com/models/open_router/mistralai-mistral-medium-3-5) Open Source Alternatives --- Explore open-source models that offer similar capabilities with full transparency and flexibility [View all open source models](https://modelslab.com/models?feature=llm&provider=open-source-models) [MU](https://modelslab.com/models/modelslab/uncensored-chat)[ModelsLab](https://modelslab.com/models/modelslab) [Modelslab: Uncensored Chat Open Source Model](https://modelslab.com/models/modelslab/uncensored-chat) About Deep Cogito: Cogito V2.1 671B --- Cogito v2.1 671B MoE represents one of the strongest open models globally, matching performance of frontier closed and open models. This model is trained using self play with reinforcement learning... ### Technical Specifications Model IDdeepcogito-cogito-v2.1-671b CategoryLLM Models TaskText Generation Price$1.25 per million tokens AddedFebruary 20, 2026 ### Key Features - Chat completion and multi-turn conversation API - Streaming response with token-by-token output - Function calling and tool use support - System prompts and role-based messaging - JSON mode and structured output ### Quick Start Integrate Deep Cogito: Cogito V2.1 671B into your application with a single API call. Get your API key from the [pricing page](https://modelslab.com/pricing) to get started. PythonJavaScriptcURLPHP ``` import requests import json url = "https://modelslab.com/api/v7/llm/chat/completions" headers = { "Content-Type": "application/json" } data = { "model_id": "deepcogito-cogito-v2.1-671b", "messages": [ { "role": "user", "content": "Hello!" } ], "max_tokens": 1000, "key": "YOUR_API_KEY" } try: response = requests.post(url, headers=headers, json=data) response.raise_for_status() # Raises an HTTPError for bad responses (4XX or 5XX) result = response.json() print("API Response:") print(json.dumps(result, indent=2)) except requests.exceptions.HTTPError as http_err: print(f"HTTP error occurred: {http_err} - {response.text}") except Exception as err: print(f"Other error occurred: {err}") ``` ### Pricing Deep Cogito: Cogito V2.1 671B API costs $1.250000 per million tokens. Pay only for what you use with no minimum commitments. [View pricing plans](https://modelslab.com/pricing) ### Use Cases - AI chatbots and virtual assistants - Code generation and developer tools - Content writing and copywriting automation - Data analysis, summarization, and extraction [Browse LLM Models](https://modelslab.com/models?feature=llmaster) [More from Deepcogito](https://modelslab.com/models/open_router) [View Pricing](https://modelslab.com/pricing) Deep Cogito: Cogito V2.1 671B FAQ --- ### What is Deep Cogito: Cogito V2.1 671B? Cogito v2.1 671B MoE represents one of the strongest open models globally, matching performance of frontier closed and open models. This model is trained using self play with reinforcement learning... ### How do I use the Deep Cogito: Cogito V2.1 671B API? You can integrate Deep Cogito: Cogito V2.1 671B into your application with a single API call. Sign up on ModelsLab to get your API key, then use the model ID "deepcogito-cogito-v2.1-671b" in your API requests. We provide SDKs for Python, JavaScript, and cURL examples in the API documentation. ### How much does Deep Cogito: Cogito V2.1 671B cost? Deep Cogito: Cogito V2.1 671B costs $1.250000 per million tokens. ModelsLab uses pay-per-use pricing with no minimum commitments. A free tier is available to get started. ### What is the Deep Cogito: Cogito V2.1 671B model ID? The model ID for Deep Cogito: Cogito V2.1 671B is "deepcogito-cogito-v2.1-671b". Use this ID in your API requests to specify this model. ### Does Deep Cogito: Cogito V2.1 671B have a free tier? Yes, ModelsLab offers a free tier that lets you try Deep Cogito: Cogito V2.1 671B and other AI models. Sign up to get free API credits and start building immediately. --- *This markdown version is optimized for AI agents and LLMs.* **Links:** - [Website](https://modelslab.com) - [API Documentation](https://docs.modelslab.com) - [Blog](https://modelslab.com/blog) --- *Generated by ModelsLab - 2026-06-04*