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Gemini 3.5 Flash vs GPT-5.6 Terra

Google against OpenAI. Prices, scores and speed below are live.

  • Gemini 3.5 Flash costs 25% less on blended price ($5.06 against $6.75 per 1M tokens, 3 input to 1 output).
  • Gemini 3.5 Flash scores higher on the Artificial Analysis Intelligence Index: 33 against 32.2.
  • On the 30 benchmarks both have scores on, Gemini 3.5 Flash leads on 14 and GPT-5.6 Terra on 16.
  • GPT-5.6 Terra reads more context: 1.1M tokens against 1M.
  • GPT-5.6 Terra is newer: listed Jul 9, 2026, against May 19, 2026.
Run both on your promptGemini 3.5 FlashGPT-5.6 Terra

Side by side

Gemini 3.5 FlashGPT-5.6 Terra
LabGoogleOpenAI
ListedMay 19, 2026Jul 9, 2026
Input per 1M tokens$2.25$3.00
Output per 1M tokens$13.50$18.00
Cached input per 1M$0.23$0.30
Blended (3:1) per 1M$5.06$6.75
Context window1M1.1M
Max output66K128K
Knowledge cutoff2025-01-012026-02-16
Intelligence index3332.2
Coding index70.176.7
ReasoningYesYes
Reads imagesYesYes
Tool useYesYes
Structured outputYesYes
Measured output speed105 tokens/s-

Every benchmark both are scored on

Each model's best score per benchmark, with its source. Scores from different sources or settings are not always comparable; each links to where it was published.

BenchmarkGemini 3.5 FlashGPT-5.6 Terra
AIME88.9%Epoch AI53.3%Epoch AI
APEX-Agents27.5%Epoch AI58.2%Epoch AI
ARC-AGI-192.5%Epoch AI96.5%Epoch AI
ARC-AGI-272.1%Epoch AI83.9%Epoch AI
Artificial Analysis Agentic Index26Artificial Analysis and OpenRouter43.2Artificial Analysis and OpenRouter
Artificial Analysis Coding Index70.1Artificial Analysis and OpenRouter76.7Artificial Analysis and OpenRouter
Artificial Analysis Intelligence Index33Artificial Analysis and OpenRouter42.3Artificial Analysis and OpenRouter
Chess Puzzles45%Epoch AI47%Epoch AI
DeepSWE37.4%Epoch AI69.6%Epoch AI
DTBench94.7%Epoch AI93.3%Epoch AI
FrontierMath Tier 4 (v2)26.8%Epoch AI70.7%Epoch AI
FrontierMath Tiers 1-3 (v2)62.8%Epoch AI86%Epoch AI
GPQA Diamond92.3%Artificial Analysis and OpenRouter88.4%Artificial Analysis and OpenRouter
LMArena (Coding)1493 EloLMArena1485 EloLMArena
LMArena (Overall)1482 EloLMArena1448 EloLMArena
LMArena: Creative Writing1471 EloLMArena1413 EloLMArena
LMArena: Hard Prompts1488 EloLMArena1469 EloLMArena
LMArena: Longer Query1483 EloLMArena1453 EloLMArena
LMArena: Math1494 EloLMArena1477 EloLMArena
LMArena: Multi-Turn1481 EloLMArena1455 EloLMArena
LMCA47.2Epoch AI55Epoch AI
Mystery Game Puzzles28%Epoch AI10%Epoch AI
ProofBench31%Epoch AI74%Epoch AI
SciCode53.9%Epoch AI55%Epoch AI
SimpleBench76.7%Epoch AI48.9%Epoch AI
SimpleQA Verified66.2%Epoch AI43.2%Epoch AI
Surface Evolver Bench58.1Epoch AI83.8Epoch AI
tau-bench (Airline)72.7%Artificial Analysis and OpenRouter72.3%Artificial Analysis and OpenRouter
WebDev Arena1506 EloEpoch AI1521 EloEpoch AI
WeirdML62.6%Epoch AI78.3%Epoch AI

More comparisons

Where these figures come from

Prices are GenMagic's own, what the studio and the API charge, recomputed from each provider's price list every few minutes. The indices are the Artificial Analysis indices, and every benchmark score links to its source, re-read daily. Measured speed is GenMagic's own generation records, in aggregate. See Google models, OpenAI models, every LLM's price and our sources.