Claude Sonnet 4 vs GPT-5 Codex
| Signal | Claude Sonnet 4 | Delta | GPT-5 Codex |
|---|---|---|---|
Capabilities | 83 | -17 | |
Benchmarks | 75 | -12 | |
Pricing | 85 | -5 | |
Context window size | 95 | +6 | |
Recency | 54 | -22 | |
Output Capacity | 80 | -5 | |
| Overall Result | 1 wins | of 6 | 5 wins |
Score History
74.4
current score
GPT-5 Codex
right now
88.7
current score
Claude Sonnet 4
Anthropic
GPT-5 Codex
OpenAI
GPT-5 Codex saves you $425.00/month
That's $5100.00/year compared to Claude Sonnet 4 at your current usage level of 100K calls/month.
| Metric | Claude Sonnet 4 | GPT-5 Codex | Winner |
|---|---|---|---|
| Overall Score | 74 | 89 | GPT-5 Codex |
| Rank | #91 | #35 | GPT-5 Codex |
| Quality Rank | #91 | #35 | GPT-5 Codex |
| Adoption Rank | #91 | #35 | GPT-5 Codex |
| Parameters | -- | -- | -- |
| Context Window | 1000K | 400K | Claude Sonnet 4 |
| Pricing | $3.00/$15.00/M | $1.25/$10.00/M | -- |
| Signal Scores | |||
| Capabilities | 83 | 100 | GPT-5 Codex |
| Benchmarks | 75 | 88 | GPT-5 Codex |
| Pricing | 85 | 90 | GPT-5 Codex |
| Context window size | 95 | 89 | Claude Sonnet 4 |
| Recency | 54 | 77 | GPT-5 Codex |
| Output Capacity | 80 | 85 | GPT-5 Codex |
Our score (0-100) is driven by benchmark performance (90%) from Arena Elo ratings, MMLU, GPQA, HumanEval, SWE-bench, and 15+ standardized evaluations. Capabilities and context window serve as tiebreakers (10%). Learn more about our methodology.
Scores 74/100 (rank #91), placing it in the top 69% of all 290 models tracked.
Scores 89/100 (rank #35), placing it in the top 88% of all 290 models tracked.
GPT-5 Codex has a 14-point advantage, which typically translates to noticeably better performance on complex reasoning, code generation, and multi-step tasks.
Choose Claude Sonnet 4 when you need:
- Processing long documents or large codebases (1000K token context)
- Step-by-step reasoning and chain-of-thought problem solving
Choose GPT-5 Codex when you need:
- High-volume production workloads where API costs must be minimized
- Step-by-step reasoning and chain-of-thought problem solving
GPT-5 Codex offers 38% better value per quality point. At 1M tokens/day, you'd spend $168.75/month with GPT-5 Codex vs $270.00/month with Claude Sonnet 4 - a $101.25 monthly difference.
Both models have comparable response speeds. For most applications, the latency difference is negligible.
When latency matters most: Interactive chatbots, IDE code completion, real-time translation, and user-facing applications where response time directly impacts experience. For batch processing, background summarization, or offline analysis, latency is less critical.
Code generation & review
Based on overall model capabilities and architecture for coding tasks like generating functions, debugging, and refactoring
Customer support chatbot
Suitable for user-facing chat with competitive response times. GPT-5 Codex also offers lower per-token costs for high-volume support
Long document analysis
Larger context window (1000K tokens) can process longer documents, contracts, and research papers in a single pass
Batch data extraction
Lower output pricing ($10.00/M) reduces costs when processing thousands of records daily
Creative writing & content
Higher overall composite score (89/100) correlates with better nuance, coherence, and style in long-form content
Image understanding & OCR
Supports vision input - can analyze screenshots, diagrams, photos, and scanned documents directly
GPT-5 Codex clearly outperforms Claude Sonnet 4 with a significant 14.299999999999997-point lead. For most general use cases, GPT-5 Codex is the stronger choice. However, Claude Sonnet 4 may still excel in niche scenarios.
By Use Case
Best for Quality
Claude Sonnet 4
Marginally better benchmark scores; both are excellent
Best for Cost
GPT-5 Codex
38% lower pricing; better value at scale
Best for Reliability
Claude Sonnet 4
Higher uptime and faster response speeds
Best for Prototyping
Claude Sonnet 4
Stronger community support and better developer experience
Best for Production
Claude Sonnet 4
Wider enterprise adoption and proven at scale
by Anthropic
- Choose for Quality - Marginally better benchmark scores; both are excellent
- Choose for Reliability - Higher uptime and faster response speeds
- Choose for Prototyping - Stronger community support and better developer experience
- Choose for Production - Wider enterprise adoption and proven at scale
| Capability | Claude Sonnet 4 | GPT-5 Codex |
|---|---|---|
| Vision (Image Input) | ||
| Function Calling | ||
| Streaming | ||
| JSON Modediffers | ||
| Reasoning | ||
| Web Search | ||
| Image Output |
Claude Sonnet 4
Anthropic
GPT-5 Codex
OpenAI
GPT-5 Codex saves you $9.15/month
That's 39% cheaper than Claude Sonnet 4 at 1,000 tokens/request and 100 requests/day.
Assumes 60% input / 40% output token ratio per request. Actual costs may vary based on your usage pattern.
| Parameter | Claude Sonnet 4 | GPT-5 Codex |
|---|---|---|
| Context Window | 1M | 400K |
| Max Output Tokens | 64,000 | 128,000 |
| Open Source | No | No |
| Created | May 22, 2025 | Sep 23, 2025 |