claude-sonnet-4-5 vs gemini-3.8-flash
Side-by-side comparison of claude-sonnet-4-5 and gemini-3.8-flash: benchmarks, pricing, context window and capabilities. Both are accessible through Requesty's unified API.
claude-sonnet-4-5
Input / 1M
$3.00
Output / 1M
$15.00
Context
1M
Model ID
vertex/claude-sonnet-4-5
gemini-3.8-flash
Input / 1M
$1.50$0.75
Output / 1M
$7.50$3.75
Context
1.0M
Model ID
vertex/gemini-3.8-flash
Benchmark comparison
Intelligence Indexreasoning
claude-sonnet-4-5N/A
gemini-3.8-flash30.8%
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 | gemini-3.8-flash | |
|---|---|---|
| Input price / 1M | $3.00 | $1.50$0.75 |
| Output price / 1M | $15.00 | $7.50$3.75 |
| Context window | 1M tokens | 1.0M tokens |
| Max output | 64K tokens | 66K tokens |
| Vision input | Yes | Yes |
| Tool calling | Yes | Yes |
| Reasoning | N/A | Yes |
| Prompt caching | Yes | Yes |
| Computer use | Yes | N/A |
| Provider | Google Vertex AI | Google Vertex AI |
Questions people ask
Is claude-sonnet-4-5 better than gemini-3.8-flash?
Benchmark data is limited for one or both models. Compare pricing and capabilities in the tables above, and test both on your own workload.
Which is cheaper, claude-sonnet-4-5 or gemini-3.8-flash?
gemini-3.8-flash is cheaper. claude-sonnet-4-5 costs $3.00/$15.00 per 1M input/output tokens, while gemini-3.8-flash costs $0.75/$3.75. The prices shown are what you pay: gemini-3.8-flash runs at 50% off its list rate of $1.50 per 1M input and $7.50 per 1M output.
Can I use claude-sonnet-4-5 and gemini-3.8-flash through the same API?
Yes. Requesty provides a single OpenAI-compatible API that routes to both. Change just the "model" parameter to switch between "vertex/claude-sonnet-4-5" and "vertex/gemini-3.8-flash", no other code changes needed.
What are the context windows?
claude-sonnet-4-5 supports up to 1M tokens of context. gemini-3.8-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-4-5 and gemini-3.8-flash with one line of code
Requesty provides a single OpenAI-compatible API for 600+ models. Change the model parameter, not your code.