Requesty

claude-sonnet-4-5 vs deepseek-v4-flash

Side-by-side comparison of claude-sonnet-4-5 and deepseek-v4-flash: benchmarks, pricing, context window and capabilities. Both are accessible through Requesty's unified API. deepseek-v4-flash outperforms claude-sonnet-4-5 on 5 of 5 shared benchmarks.

Anthropic PBC logo
Anthropic PBC
claude-sonnet-4-5
Input / 1M
$3.00
Output / 1M
$15.00
Context
1M
Model ID
anthropic/claude-sonnet-4-5
Novita AI logo
Novita AI
deepseek-v4-flash
Input / 1M
$0.14
Output / 1M
$0.28
Context
1.0M
Model ID
novita/deepseek/deepseek-v4-flash

Benchmark comparison

Intelligence Indexreasoning
claude-sonnet-4-537.4%
deepseek-v4-flash51.8%
Coding Indexcoding
claude-sonnet-4-552.1%
deepseek-v4-flash69.1%
Math Indexmath
claude-sonnet-4-588.0%
deepseek-v4-flashN/A
GPQA Diamondreasoning
claude-sonnet-4-583.4%
deepseek-v4-flash90.8%
AIME 2025math
claude-sonnet-4-588.0%
deepseek-v4-flashN/A
LiveCodeBenchcoding
claude-sonnet-4-571.4%
deepseek-v4-flashN/A
Terminal-Bench Hardagentic
claude-sonnet-4-535.6%
deepseek-v4-flashN/A
τ²-Benchagentic
claude-sonnet-4-578.1%
deepseek-v4-flashN/A
SciCodecoding
claude-sonnet-4-544.7%
deepseek-v4-flash49.9%
MMLU Proknowledge
claude-sonnet-4-587.5%
deepseek-v4-flashN/A
Humanity's Last Examreasoning
claude-sonnet-4-517.8%
deepseek-v4-flash38.6%

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-4-5deepseek-v4-flash
Input price / 1M$3.00$0.14
Output price / 1M$15.00$0.28
Context window1M tokens1.0M tokens
Max output64K tokensN/A
Vision inputYesN/A
Tool callingYesYes
ReasoningYesYes
Prompt cachingYesN/A
Computer useYesN/A
ProviderAnthropic PBCNovita AI

Questions people ask

Is claude-sonnet-4-5 better than deepseek-v4-flash?
deepseek-v4-flash outperforms claude-sonnet-4-5 on 5 of 5 shared benchmarks. See the benchmark comparison above for specifics: claude-sonnet-4-5 and deepseek-v4-flash have different strengths across reasoning, coding, math and multimodal tasks.
Which is cheaper, claude-sonnet-4-5 or deepseek-v4-flash?
deepseek-v4-flash is cheaper. claude-sonnet-4-5 costs $3.00/$15.00 per 1M input/output tokens, while deepseek-v4-flash costs $0.14/$0.28.
Can I use claude-sonnet-4-5 and deepseek-v4-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 "anthropic/claude-sonnet-4-5" and "novita/deepseek/deepseek-v4-flash", no other code changes needed.
What are the context windows?
claude-sonnet-4-5 supports up to 1M tokens of context. deepseek-v4-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 deepseek-v4-flash with one line of code

Requesty provides a single OpenAI-compatible API for 600+ models. Change the model parameter, not your code.