claude-sonnet-4-6 vs gemini-2.5-flash
Side-by-side comparison of claude-sonnet-4-6 and gemini-2.5-flash — benchmarks, pricing, context window and capabilities. Both are accessible through Requesty's unified API. claude-sonnet-4-6 outperforms gemini-2.5-flash on 9 of 9 shared benchmarks.
claude-sonnet-4-6
Input / 1M
$3.00
Output / 1M
$15.00
Context
1M
Model ID
anthropic/claude-sonnet-4-6
gemini-2.5-flash
Input / 1M
$0.30
Output / 1M
$2.50
Context
1.0M
Model ID
google/gemini-2.5-flash
Benchmark comparison
MMLU Proknowledge
claude-sonnet-4-685.2%
gemini-2.5-flash78.4%
GPQA Diamondreasoning
claude-sonnet-4-676.8%
gemini-2.5-flash68.3%
HumanEvalcoding
claude-sonnet-4-693.5%
gemini-2.5-flash88.5%
SWE-Bench Verifiedcoding
claude-sonnet-4-677.2%
gemini-2.5-flash53.2%
MATHmath
claude-sonnet-4-689.4%
gemini-2.5-flash85.3%
AIME 2024math
claude-sonnet-4-680.4%
gemini-2.5-flash72.1%
MMMUmultimodal
claude-sonnet-4-674.3%
gemini-2.5-flash72.5%
LiveBenchreasoning
claude-sonnet-4-671.8%
gemini-2.5-flash64.2%
τ-bench Retailagentic
claude-sonnet-4-670.1%
gemini-2.5-flash61.5%
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-4-6 | gemini-2.5-flash | |
|---|---|---|
| Input price / 1M | $3.00 | $0.30 |
| Output price / 1M | $15.00 | $2.50 |
| Context window | 1M tokens | 1.0M tokens |
| Max output | 64K tokens | 66K tokens |
| Vision input | Yes | Yes |
| Tool calling | Yes | Yes |
| Reasoning | Yes | Yes |
| Prompt caching | Yes | Yes |
| Computer use | Yes | — |
| Provider | Anthropic PBC | Google LLC (Gemini API) |
Questions people ask
Is claude-sonnet-4-6 better than gemini-2.5-flash?
claude-sonnet-4-6 outperforms gemini-2.5-flash on 9 of 9 shared benchmarks. See the benchmark comparison above for specifics — claude-sonnet-4-6 and gemini-2.5-flash have different strengths across reasoning, coding, math and multimodal tasks.
Which is cheaper — claude-sonnet-4-6 or gemini-2.5-flash?
gemini-2.5-flash is cheaper. claude-sonnet-4-6 costs $3.00/$15.00 per 1M input/output tokens, while gemini-2.5-flash costs $0.30/$2.50.
Can I use claude-sonnet-4-6 and gemini-2.5-flash 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-4-6" or "google/gemini-2.5-flash" — no other code changes needed.
What are the context windows?
claude-sonnet-4-6 supports up to 1M tokens of context. gemini-2.5-flash supports up to 1.0M 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-4-6 and gemini-2.5-flash with one line of code
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