Claude Sonnet 5 vs GPT-5.2-Codex
| Signal | Claude Sonnet 5 | Delta | GPT-5.2-Codex |
|---|---|---|---|
Capabilities | 100 | -- | |
Pricing | 90 | +4 | |
Context window size | 95 | +6 | |
Recency | 100 | +5 | |
Output Capacity | 85 | -- | |
Benchmarks | 0 | -58 | |
| Overall Result | 3 wins | of 6 | 1 wins |
Score History
85.2
current score
GPT-5.2-Codex
right now
90.5
current score
Claude Sonnet 5
Anthropic
GPT-5.2-Codex
OpenAI
Claude Sonnet 5 saves you $175.00/month
That's $2100.00/year compared to GPT-5.2-Codex at your current usage level of 100K calls/month.
| Metric | Claude Sonnet 5 | GPT-5.2-Codex | Winner |
|---|---|---|---|
| Overall Score | 85 | 91 | GPT-5.2-Codex |
| Rank | #65 | #24 | GPT-5.2-Codex |
| Quality Rank | #65 | #24 | GPT-5.2-Codex |
| Adoption Rank | #65 | #24 | GPT-5.2-Codex |
| Parameters | -- | -- | -- |
| Context Window | 1000K | 400K | Claude Sonnet 5 |
| Pricing | $2.00/$10.00/M | $1.75/$14.00/M | -- |
| Signal Scores | |||
| Capabilities | 100 | 100 | Claude Sonnet 5 |
| Pricing | 90 | 86 | Claude Sonnet 5 |
| Context window size | 95 | 89 | Claude Sonnet 5 |
| Recency | 100 | 95 | Claude Sonnet 5 |
| Output Capacity | 85 | 85 | Claude Sonnet 5 |
| Benchmarks | -- | 58 | GPT-5.2-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 85/100 (rank #65), placing it in the top 78% of all 290 models tracked.
Scores 91/100 (rank #24), placing it in the top 92% of all 290 models tracked.
GPT-5.2-Codex has a 5-point advantage, which typically translates to noticeably better performance on complex reasoning, code generation, and multi-step tasks.
Choose Claude Sonnet 5 when you need:
- Processing long documents or large codebases (1000K token context)
- Step-by-step reasoning and chain-of-thought problem solving
Choose GPT-5.2-Codex when you need:
- Step-by-step reasoning and chain-of-thought problem solving
Claude Sonnet 5 offers 24% better value per quality point. At 1M tokens/day, you'd spend $180.00/month with Claude Sonnet 5 vs $236.25/month with GPT-5.2-Codex - a $56.25 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. Claude Sonnet 5 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 (91/100) 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-5.2-Codex has a moderate advantage with a 5.299999999999997-point lead in composite score. It wins on more signal dimensions, but Claude Sonnet 5 has specific strengths that could make it the better choice for certain workflows.
By Use Case
Best for Quality
Claude Sonnet 5
Marginally better benchmark scores; both are excellent
Best for Cost
Claude Sonnet 5
24% lower pricing; better value at scale
Best for Reliability
Claude Sonnet 5
Higher uptime and faster response speeds
Best for Prototyping
Claude Sonnet 5
Stronger community support and better developer experience
Best for Production
Claude Sonnet 5
Wider enterprise adoption and proven at scale
by Anthropic
- Choose for Quality - Marginally better benchmark scores; both are excellent
- Choose for Cost - 24% lower pricing; better value at scale
- 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 5 | GPT-5.2-Codex |
|---|---|---|
| Vision (Image Input) | ||
| Function Calling | ||
| Streaming | ||
| JSON Mode | ||
| Reasoning | ||
| Web Search | ||
| Image Output |
Claude Sonnet 5
Anthropic
GPT-5.2-Codex
OpenAI
Claude Sonnet 5 saves you $4.35/month
That's 22% cheaper than GPT-5.2-Codex 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 5 | GPT-5.2-Codex |
|---|---|---|
| Context Window | 1M | 400K |
| Max Output Tokens | 128,000 | 128,000 |
| Open Source | No | No |
| Created | Jun 30, 2026 | Jan 14, 2026 |