Baidu Ernie 4.5 21B A3b Thinking

Novita AI chat

Baidu Ernie 4.5 21B A3b Thinking is a Novita AI chat model.It supports a 131,072-token context windowwith up to 65,536 output tokens.Input is priced at $0.0700/M tokens and output at $0.280/M tokens. Capabilities include reasoning. Route Baidu Ernie 4.5 21B A3b Thinking via Future AGI's Agent Command Center for unified observability, caching, and 15 routing strategies including cost-optimized fallback.

Pricing source: litellm Last verified: May 12, 2026 View source ↗
Cost calculator

Estimate Baidu Ernie 4.5 21B A3b Thinking spend

Pick a workload, fine-tune the sliders, and see the monthly bill.

~3K in / ~400 out · 5K req/day
3,000
0131,072
400
065,536
5,000
01,000,000
Per request
$0.000322
in $0.000210 · out $0.000112
Per day
$1.61
5,000 requests
Per month
$49.00
152,188 requests

Estimate uses $0.0700/M input · $0.2800/M output. Provider pricing changes. Production costs vary with retries, streaming overhead, and tool-call rounds.
Want this for free? Cache + route via Agent Command Center — first 100K requests and 100K cache hits free every month.

Pricing

Per-token rates, expressed in USD per 1M tokens. Verified May 12, 2026.

Input $0.0700/M
Output $0.280/M

Limits

Context window
131,072 tokens
Max input
131,072 tokens
Max output
65,536 tokens
Modalities
text

Capabilities

  • Function calling — not advertised
  • Parallel tool calls — not advertised
  • Vision input — not advertised
  • Audio input — not advertised
  • Audio output — not advertised
  • PDF input — not advertised
  • Streaming ✓ supported
  • Structured output — not advertised
  • Prompt caching — not advertised
  • Reasoning ✓ supported

Where it's strong

  • +multi-step reasoning and analysis tasks

Watch out for

  • !high cost — input + output rates are in the top 88% of priced chat peers; consider a cheaper sibling for high-volume workloads
  • !agentic workflows — no advertised function-calling; use a tool-capable model and route via Agent Command Center for fallback
  • !strict structured output — no JSON-schema enforcement, expect retry loops

Benchmarks pending

We haven't logged public benchmark scores for Baidu Ernie 4.5 21B A3b Thinking yet. Have one to contribute? Submit a source — citations help us prioritise.

Try it

Call Baidu Ernie 4.5 21B A3b Thinking via Agent Command Center

One OpenAI-compatible endpoint. Routing, fallback, semantic caching, guardrails, and cost tracking come along for the ride. First 100K requests + 100K cache hits free every month.

SDK
Native Future AGI client (agentcc / @agentcc/client). Per-call metadata — provider, cost, latency, cache hit, request id — is returned on x-agentcc-* response headers, so any HTTP client can read it.
# Baidu Ernie 4.5 21B A3b Thinking via the Agent Command Center Python SDK
# pip install agentcc
import os
from agentcc import AgentCC

client = AgentCC(
    api_key=os.environ["AGENTCC_API_KEY"],   # from app.futureagi.com → Settings → API Keys
    base_url="https://gateway.futureagi.com/v1",
)

resp = client.chat.completions.create(
    model="novita-ai/baidu-ernie-4-5-21b-a3b-thinking",
    messages=[{"role": "user", "content": "Hello, Baidu Ernie 4.5 21B A3b Thinking!"}],
)

print(resp.choices[0].message.content)
print(f"Tokens: {resp.usage.total_tokens}")

# Per-call gateway metadata is returned on x-agentcc-* response headers.
# When you need it programmatically, use .with_raw_response to get them:
raw = client.chat.completions.with_raw_response.create(
    model="novita-ai/baidu-ernie-4-5-21b-a3b-thinking",
    messages=[{"role": "user", "content": "Same call, but I want the headers."}],
)
print("Provider:", raw.headers.get("x-agentcc-provider"))
print("Latency:", raw.headers.get("x-agentcc-latency-ms"), "ms")
print("Cost:   ", raw.headers.get("x-agentcc-cost"), "USD")
print("Cache:  ", raw.headers.get("x-agentcc-cache"))
Set AGENTCC_API_KEY with a key fromapp.futureagi.com.Gateway docs ↗

Compare with similar models

Baidu Ernie 4.5 21B A3b Thinking doesn't have a public Arena ELO score yet, so we group by provider only — quality-tier comparisons need a benchmark.

FAQ

How much does Baidu Ernie 4.5 21B A3b Thinking cost?

Input is priced at $0.0700 per 1M tokens and output at $0.280 per 1M tokens (Novita AI, last verified May 12, 2026).

What is the context window of Baidu Ernie 4.5 21B A3b Thinking?

Baidu Ernie 4.5 21B A3b Thinking supports a 131,072-token context window with up to 65,536 output tokens.

Does Baidu Ernie 4.5 21B A3b Thinking support function calling?

Baidu Ernie 4.5 21B A3b Thinking does not currently advertise function-calling support. For agentic workloads, prefer a tool-calling-capable model and route via Agent Command Center for fallback.

Is Baidu Ernie 4.5 21B A3b Thinking good for production?

Baidu Ernie 4.5 21B A3b Thinking is well-suited for multi-step reasoning and analysis tasks. Consider alternatives if you need high cost — input + output rates are in the top 88% of priced chat peers; consider a cheaper sibling for high-volume workloads.

How can I route to Baidu Ernie 4.5 21B A3b Thinking with fallback?

Use Agent Command Center: a single OpenAI-compatible endpoint that supports cost-optimized routing, latency-aware retries, model fallback, and shadow traffic. Configure once, swap models without app changes.

Useful links for Baidu Ernie 4.5 21B A3b Thinking

Official sources, independent benchmarks, and pricing aggregators — no random search-engine guesses.