claude-sonnet-4-5 vs grok-4
Side-by-side comparison of claude-sonnet-4-5 and grok-4 — benchmarks, pricing, context window and capabilities. Both are accessible through Requesty's unified API. grok-4 outperforms claude-sonnet-4-5 on 8 of 8 shared benchmarks.
claude-sonnet-4-5
Input / 1M
$3.00
Output / 1M
$15.00
Context
1M
Model ID
anthropic/claude-sonnet-4-5
xAI Corp.
grok-4
Input / 1M
$3.00
Output / 1M
$15.00
Context
256K
Model ID
xai/grok-4
Benchmark comparison
MMLU Proknowledge
claude-sonnet-4-583.8%
grok-487.5%
GPQA Diamondreasoning
claude-sonnet-4-574.2%
grok-487.5%
HumanEvalcoding
claude-sonnet-4-592.0%
grok-493.8%
SWE-Bench Verifiedcoding
claude-sonnet-4-570.8%
grok-472.5%
MATHmath
claude-sonnet-4-587.5%
grok-494.1%
AIME 2024math
claude-sonnet-4-576.1%
grok-490.1%
MMMUmultimodal
claude-sonnet-4-573.1%
grok-477.9%
LiveBenchreasoning
claude-sonnet-4-569.5%
grok-475.4%
τ-bench Retailagentic
claude-sonnet-4-567.3%
grok-4—
Scores sourced from official model cards, Artificial Analysis, and public leaderboards. Benchmarks measure specific skills and don't capture every aspect of model quality.
Pricing & specifications
| claude-sonnet-4-5 | grok-4 | |
|---|---|---|
| Input price / 1M | $3.00 | $3.00 |
| Output price / 1M | $15.00 | $15.00 |
| Context window | 1M tokens | 256K tokens |
| Max output | 64K tokens | — |
| Vision input | Yes | Yes |
| Tool calling | Yes | Yes |
| Reasoning | Yes | — |
| Prompt caching | Yes | Yes |
| Computer use | Yes | Yes |
| Provider | Anthropic PBC | xAI Corp. |
Questions people ask
Is claude-sonnet-4-5 better than grok-4?
grok-4 outperforms claude-sonnet-4-5 on 8 of 8 shared benchmarks. See the benchmark comparison above for specifics — claude-sonnet-4-5 and grok-4 have different strengths across reasoning, coding, math and multimodal tasks.
Which is cheaper — claude-sonnet-4-5 or grok-4?
claude-sonnet-4-5 and grok-4 have identical combined pricing.
Can I use claude-sonnet-4-5 and grok-4 through the same API?
Yes. Requesty provides a single OpenAI-compatible API that routes to both. Change just the "model" parameter to switch — "anthropic/claude-sonnet-4-5" or "xai/grok-4" — no other code changes needed.
What are the context windows?
claude-sonnet-4-5 supports up to 1M tokens of context. grok-4 supports up to 256K tokens. Longer context means you can feed larger documents or codebases in a single prompt, though quality often degrades past 128K for most models.
Switch between claude-sonnet-4-5 and grok-4 with one line of code
Requesty provides a single OpenAI-compatible API for 400+ models. Change the model parameter, not your code.
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