Cogito v2.1 671B API128K context

Pricing & specs mirror our live pricing as of July 2026 (pay-as-you-go).

What is 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...

Cogito v2.1 671B pricing

Pay-as-you-go on DataLLM Lab — these are our live list prices (identical to the pricing page):

On output price, Cogito v2.1 671B is cheaper than 54% of the 309 models in the catalog.

What Cogito v2.1 671B costs per month

Cost = input price × input volume + output price × output volume. The same five workloads run on every model page, so any two compare directly.

Cogito v2.1 671B vs alternatives

When not to use Cogito v2.1 671B

• It is served by a single provider, so there is less failover headroom during an outage.

Specs

How to call Cogito v2.1 671B

Copyfrom openai import OpenAI
client = OpenAI(base_url="https://api.datallmlab.com/v1", api_key="YOUR_DATALLM_LAB_KEY")
resp = client.chat.completions.create(
    model="deepcogito/cogito-v2.1-671b",
    messages=[{"role": "user", "content": "Hello"}],
)
print(resp.choices[0].message.content)

Copycurl https://api.datallmlab.com/v1/chat/completions \
  -H "Authorization: Bearer YOUR_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"deepcogito/cogito-v2.1-671b","messages":[{"role":"user","content":"Hello"}]}'

Copyimport OpenAI from "openai";
const client = new OpenAI({ baseURL: "https://api.datallmlab.com/v1", apiKey: process.env.DATALLM_KEY });
const r = await client.chat.completions.create({
  model: "deepcogito/cogito-v2.1-671b",
  messages: [{ role: "user", content: "Hello" }],
});
console.log(r.choices[0].message.content);

The same key routes Cogito v2.1 671B and 300+ other models — switch models by changing one string. How OpenAI-compatible APIs work.

Prompting tips for Cogito v2.1 671B

• State the goal, not every step. Cogito v2.1 671B reasons internally — give it the objective, constraints and success criteria and let it plan the approach; over-scripting each step tends to lower quality. Turn effort up for hard problems.
• Constrain JSON with a schema. Use response_format / structured outputs rather than "reply in JSON" to get valid, parseable objects every time.

Tips are derived from Cogito v2.1 671B's actual capabilities — context window, tool & JSON support, modality and price tier — not generic advice.

Open-source tools for Cogito v2.1 671B

Popular open-source frameworks and agents to build with Cogito v2.1 671B over the API — star counts pulled from GitHub (July 2026).

Listed by GitHub stars; inclusion is by ecosystem relevance (agent frameworks, SDKs and gateways), not affiliation. Stars change — see each repo for current numbers.

Migrating to Cogito v2.1 671B

Coming from OpenAI or another gateway? On an OpenAI-compatible setup the only changes are base_url → https://api.datallmlab.com/v1 and model → deepcogito/cogito-v2.1-671b. Messages, streaming and the rest of your code stay the same. Routing & failover guide.

Rate limits & reliability

Rate limits here are the DataLLM Lab gateway's, not the upstream vendor's. On 429 (rate limited) or 503 (provider busy), retry with exponential backoff. See the error-code guide and failover setup.

Related reading

Frequently asked questions