Claude 3.5 Sonnet vs Grok 3: Detailed Comparison
Choosing between Claude 3.5 Sonnet (Anthropic) and
Grok 3 (xAI) comes down to three things:
per-token pricing, context window, and which capability matters most for your workload.
Claude 3.5 Sonnet costs $3.00/M input vs
$3.00/M for Grok 3;
context windows are 200K vs
1.0M tokens. Detailed breakdown below.
Side-by-side specs
| Spec | Claude 3.5 Sonnet | Grok 3 |
|---|
| Provider | Anthropic | xAI |
|---|
| Released | 2024-10-22 | 2025-02-17 |
|---|
| Input price |
$3.00/M |
$3.00/M |
| Output price |
$15.00/M |
$15.00/M |
| Cached input |
$0.3000/M |
— |
| Context window |
200K |
1.0M |
| Max output |
8K |
16K |
| Modalities |
text image |
text image |
| Tokenizer |
claude-3 |
grok |
Capability matrix
| Capability | Claude 3.5 Sonnet | Grok 3 |
|---|
| function calling |
Yes |
Yes |
| json mode |
Yes |
Yes |
| vision |
Yes |
Yes |
| streaming |
Yes |
Yes |
| tool use |
Yes |
No |
| realtime web |
No |
Yes |
Benchmark comparison
Higher is better for all benchmarks shown.
Per-call cost on typical workloads
| Workload (in/out tokens) | Claude 3.5 Sonnet | Grok 3 | Cheaper by |
|---|
| Standard chat (1K / 500) |
$0.010500 |
$0.010500 |
Tied |
| RAG (4K / 500) |
$0.019500 |
$0.019500 |
Tied |
| Long doc (20K / 1K) |
$0.075000 |
$0.075000 |
Tied |
| Very long context (100K / 2K) |
$0.322500 |
$0.322500 |
Tied |
When to choose Claude 3.5 Sonnet over Grok 3
- Supports tool use — Grok 3 does not.
When to choose Grok 3 over Claude 3.5 Sonnet
- Larger context window (1.0M vs 200K).
- Supports realtime web — Claude 3.5 Sonnet does not.
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