⚡ ChatGPT vs Claude vs Gemini
The definitive 2025 comparison: pricing, context windows, capabilities, benchmarks, and API
features. GPT-4.1 vs Claude Sonnet 4 vs Gemini 2.5 Pro.
1. Flagship Models at a Glance
OpenAI GPT-4.1
$2 / $8
Input / Output per M tokens
1,047,576 context
Anthropic Claude Sonnet 4
$3 / $15
Input / Output per M tokens
200,000 context
Google Gemini 2.5 Pro
$1.25 / $10
Input / Output per M tokens
1,048,576 context
2. Pricing Comparison
| Feature |
GPT-4.1 |
Claude Sonnet 4 |
Gemini 2.5 Pro |
| Input price ($/M tokens) |
$2.00 |
$3.00 |
$1.25 |
| Output price ($/M tokens) |
$8.00 |
$15.00 |
$10.00 |
| Cache input ($/M tokens) |
$0.50 |
$0.30 |
$0.07 |
| Context window |
1,047,576 |
200,000 |
1,048,576 |
| Max output tokens |
32,768 |
64,000 |
65,536 |
| Free tier |
No |
Yes (limited) |
Yes (generous) |
Winner on price: Gemini 2.5 Pro offers the best input pricing ($1.25/M) and
cache pricing ($0.07/M). GPT-4.1 wins on output pricing ($8/M vs $10-15/M).
3. Capabilities
| Capability |
GPT-4.1 |
Claude Sonnet 4 |
Gemini 2.5 Pro |
| Tool calling |
✅ |
✅ |
✅ |
| Structured output |
✅ |
✅ |
✅ |
| Reasoning (extended thinking) |
❌ (use o3) |
✅ |
✅ |
| Vision (image input) |
✅ |
✅ |
✅ |
| Image generation |
✅ (DALL-E) |
❌ |
✅ (Imagen) |
| Audio input |
✅ |
❌ |
✅ |
| Audio output |
✅ |
❌ |
✅ |
| Video input |
❌ |
❌ |
✅ |
| PDF input |
✅ |
✅ |
✅ |
| Code execution |
✅ |
✅ (analysis tool) |
✅ |
Winner on capabilities: Gemini 2.5 Pro has the broadest multimodal support
(video, audio I/O, image generation). Claude Sonnet 4 excels at coding and analysis. GPT-4.1
has the strongest tool calling (BFCL #1).
4. Benchmark Performance
| Benchmark |
GPT-4.1 |
Claude Sonnet 4 |
Gemini 2.5 Pro |
| MMLU |
~90% |
~88% |
~90% |
| MATH-500 |
~85% |
~88% |
~91% |
| HumanEval |
~91% |
~93% |
~90% |
| SWE-bench Verified |
~65% |
~72% |
~63% |
| GPQA Diamond |
~72% |
~70% |
~78% |
| BFCL v3 (tool calling) |
~88% |
~86% |
~85% |
| Chatbot Arena |
~1380 |
~1370 |
~1360 |
Key takeaway: No single model wins all benchmarks. GPT-4.1 leads on tool
calling and chat. Claude Sonnet 4 dominates coding (SWE-bench). Gemini 2.5 Pro excels at
math and science.
5. API & Developer Experience
| Feature |
OpenAI |
Anthropic |
Google |
| API maturity |
Most mature |
Mature |
Maturing |
| SDK languages |
Python, Node, Go, etc. |
Python, Node |
Python, Node, Go, etc. |
| Streaming |
✅ SSE |
✅ SSE |
✅ SSE |
| Function calling |
Parallel, strict mode |
Parallel, forced tool |
Parallel, auto |
| Batch API |
✅ (50% discount) |
✅ (50% discount) |
✅ (50% discount) |
| Fine-tuning |
✅ |
❌ |
✅ (limited) |
| Rate limits |
Tier-based |
Tier-based |
Per-project |
6. Budget Alternatives
| Use Case |
Best Budget Option |
Price |
Why |
| General chat |
Gemini 2.5 Flash |
Free |
Strong quality at zero cost |
| Coding |
DeepSeek V3 |
$0.07/$0.27 |
Near-frontier coding at 1/30th the price |
| Reasoning |
DeepSeek R1 |
Free |
Top-tier reasoning at zero cost |
| Tool calling |
Gemini 2.5 Flash |
Free |
Strong BFCL scores for free |
| Long context |
Gemini 2.5 Flash |
Free |
1M context window for free |
| Open source |
Qwen3-235B |
Free |
Best open-weight model |
7. The Verdict
| If you need... |
Choose |
Because |
| Best overall value |
Gemini 2.5 Pro |
Lowest input price, 1M context, broadest capabilities |
| Best coding assistant |
Claude Sonnet 4 |
#1 on SWE-bench, 64K output, analysis tool |
| Best tool calling |
GPT-4.1 |
#1 on BFCL, parallel calls, strict mode |
| Best free option |
Gemini 2.5 Flash |
Free with 1M context, strong capabilities |
| Best reasoning |
o3 / DeepSeek R1 |
Reasoning models outperform standard models on math/science |
| Most mature API |
OpenAI |
Widest SDK support, fine-tuning, most integrations |