Deprecated compatibility alias. Requests route to Gemini 2.5 Flash Lite with the stable thinking path.
Added Sep 25, 2025
Context Window
1.0M
Max Output
65.5K
Input Price (Auto)
$0.10/1M
Output Price (Auto)
$0.40/1M
Cache Read (Auto)
$0.010/1M
Capabilities
Benchmarks
Benchmarks
Performance metrics and benchmarks
Sourced from Artificial Analysis.
Intelligence Index
10.4
Agentic work
T²-Bench Telecom (legacy)
Legacy fallback · Conversational AI agents in dual-control scenarios
30.7%
Better than 38% of models compared
Document reasoning
AA-LCR v1.1
Long context reasoning with updated grading
64.7%
Better than 59% of models compared
Reasoning
HLE
Humanity's Last Exam
7.0%
Better than 45% of models compared
IFBench
Instruction-following benchmark
52.6%
Better than 63% of models compared
CritPt
Research-level physics reasoning
0.0%
Coding
Terminal-Bench Hard (legacy)
Legacy fallback · Agentic coding and terminal use
12.9%
Better than 49% of models compared
LiveCodeBench
Contamination-free coding benchmark
68.8%
Better than 77% of models compared
Math
AIME 2025
American Invitational Mathematics Examination 2025
68.7%
Better than 63% of models compared
Knowledge
MMLU-Pro
Professional and academic subject knowledge
80.8%
Better than 71% of models compared
AA-Omniscience Accuracy
Proportion of correctly answered questions
18.0%
AA-Omniscience Hallucination Rate
Rate of incorrect answers among non-correct responses
87.8%
Legacy benchmarks
GPQA Diamond (legacy)
Graduate-level scientific reasoning
70.9%
Better than 49% of models compared
AA-LCR (unversioned / legacy)
Long context reasoning evaluation
64.7%
Better than 59% of models compared
Last updated Sep 13, 2026
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Gemini 2.5 Flash Preview (09/2025)
gemini-2.5-flash-preview-09-2025State-of-the-art Gemini 2.5 Flash checkpoint tuned for advanced reasoning, coding, math, and scientific tasks. Built-in thinking for higher accuracy and nuanced context handling. Routed to Gemini 2.5 Flash (stable).
Gemini 2.5 Flash Preview (09/2025) – Thinking
gemini-2.5-flash-preview-09-2025-thinkingSame checkpoint with thinking enabled by default for deeper reasoning and stepwise analysis on complex tasks. Routed to Gemini 2.5 Flash Thinking (stable).