Claude Sonnet 5 – benchmark results

Anthropic released Claude Sonnet 5 (Adaptive Reasoning, Max Effort) on June 30, 2026, scoring 53 on the Artificial Analysis Intelligence Index, well above the average of 8 among comparable models. The model supports text and image input, outputs text, has a 1m token context window, and is competitively priced at $0.00 per 1M input and output tokens.

Claude Sonnet 5 Adaptive Reasoning, Max Effort Intelligence, Performance & Price Analysis API Provider Benchmarks /models/claude-sonnet-5/providers Model summary IntelligenceUpdated Speed Input Price Output Price Verbosity Claude Sonnet 5 Adaptive Reasoning, Max Effort is amongst the leading models in intelligence and well priced when comparing to other models of similar price. The model supports text and image input, outputs text, and has a 1m tokens context window. Claude Sonnet 5 Adaptive Reasoning, Max Effort scores 53 on the Artificial Analysis Intelligence Index, placing it well above average among comparable models averaging 8 . When evaluating the Intelligence Index, it generated 300M tokens, which is very verbose in comparison to the average of 37M. Pricing for Claude Sonnet 5 Adaptive Reasoning, Max Effort is $0.00 per 1M input tokens competitively priced, average: $0.00 and $0.00 per 1M output tokens competitively priced, average: $0.00 . | Reasoning | Yes This page shows the reasoning version of this model. A non-reasoning variant may also exist. | |---|---| | Input modality | Supports: text, image | | Output modality | Supports: text | | Context window | 1m ~1500 A4 pages of size 12 Arial font | Metrics are compared against models of the same class: - Non-reasoning models → compared only with other non-reasoning models - Reasoning models → compared across both reasoning and non-reasoning - Open weights models → compared only with other open weights models of the same size class: - Tiny: ≤4B parameters - Small: 4B–40B parameters - Medium: 40B–150B parameters - Large: 150B parameters - Proprietary models → compared across proprietary and open weights models of the same price range, using a blended 3:1 input/output price ratio: - <$0.15 per 1M tokens - $0.15–$1 per 1M tokens - $1 per 1M tokens Highlights IntelligenceUpdated Artificial Analysis Intelligence Index Artificial Analysis Intelligence Index by Open Weights / Proprietary Intelligence Evaluations GDPval-AA v2 /evaluations/gdpval-aa Updated Agentic real-world work tasks, Elo-500 /2000 𝜏³-Banking /evaluations/tau3-banking New Agentic tool use Agentic coding & terminal use Coding Reasoning & knowledge Scientific reasoning Physics reasoning Knowledge 1 - hallucination rate Long context reasoning AA-Briefcase /evaluations/aa-briefcase New Agentic knowledge work, Elo-500 /2000 Instruction following Long-horizon agentic tasks Kubernetes incident root-cause analysis Visual reasoning AA-BriefcaseNew AA-Briefcase Elo Openness Artificial Analysis Openness Index: Score Intelligence Index Comparisons Intelligence vs. Cost per Intelligence Index Task Token UseUpdated Output Tokens per Intelligence Index Task Price and CostUpdated Cost per Intelligence Index Task Cost to Run Artificial Analysis Intelligence Index Pricing: Cache Hit, Input, and Output Context Window Context Window SpeedUpdated Measured by Output Speed tokens per second Output Speed Time per Intelligence Index Task Latency Measured by Time seconds to First Token Latency: Time To First Answer Token End-to-End Response Time Seconds to output 500 tokens, calculated based on time to first token, 'thinking' time for reasoning models, and output speed End-to-End Response Time Model Size Open Weights Models Only Model Size: Total and Active Parameters Frequently Asked Questions Common questions about Claude Sonnet 5 Adaptive Reasoning, Max Effort Claude Sonnet 5 Adaptive Reasoning, Max Effort was released on June 30, 2026. Claude Sonnet 5 Adaptive Reasoning, Max Effort was created by Anthropic. Claude Sonnet 5 Adaptive Reasoning, Max Effort scores 53 on the Artificial Analysis Intelligence Index, placing it well above average among other reasoning models in a similar price tier median: 8 . When evaluated on the Intelligence Index, Claude Sonnet 5 Adaptive Reasoning, Max Effort generated 300M output tokens, which is at the higher end compared to other reasoning models in a similar price tier median: 37M . Yes, Claude Sonnet 5 Adaptive Reasoning, Max Effort is a reasoning model. It uses extended thinking or chain-of-thought reasoning to work through complex problems before providing an answer. Claude Sonnet 5 Adaptive Reasoning, Max Effort supports text and image input. Claude Sonnet 5 Adaptive Reasoning, Max Effort supports text output. Yes, Claude Sonnet 5 Adaptive Reasoning, Max Effort supports image input and can analyze, describe, and answer questions about images. Yes, Claude Sonnet 5 Adaptive Reasoning, Max Effort is multimodal. It can process text and image input and generate text output. Claude Sonnet 5 Adaptive Reasoning, Max Effort has a context window of 1.0M tokens. This determines how much text and conversation history the model can process in a single request. No, Claude Sonnet 5 Adaptive Reasoning, Max Effort is proprietary. The model weights are not publicly available. Claude Sonnet 5 Adaptive Reasoning, Max Effort is a proprietary model and Anthropic has not disclosed the model size or parameter count. Claude Sonnet 5 Adaptive Reasoning, Max Effort achieves a score of 53 on the Artificial Analysis Intelligence Index. This composite benchmark evaluates models across reasoning, knowledge, mathematics, and coding. Check the providers page for current API availability. View providers /models/claude-sonnet-5/providers Visit the providers page to see availability. Compare providers /models/claude-sonnet-5/providers